Have the makefile run windepoyqt if it exists to copy the required dlls to the instal...
[metze/wireshark/wip.git] / acinclude.m4
index 2d1df93a59dfbdb9ff29e36f7c426c153a867238..35263ea139584d20b7ae0e13eb3c4d07a114c943 100644 (file)
@@ -104,6 +104,28 @@ AC_DEFUN([AC_WIRESHARK_TIMEZONE_ABBREV],
 ])
 
 
+#
+# AC_WIRESHARK_STRUCT_ST_FLAGS
+#
+dnl AC_STRUCT_ST_BLKSIZE extracted from the file in question,
+dnl "acspecific.m4" in GNU Autoconf 2.12, and turned into
+dnl AC_WIRESHARK_STRUCT_ST_FLAGS, which checks if "struct stat"
+dnl has the 4.4BSD "st_flags" member, and defines HAVE_ST_FLAGS; that's
+dnl what's in this file.
+dnl Done by Guy Harris <guy@alum.mit.edu> on 2012-06-02.
+
+dnl ### Checks for structure members
+
+AC_DEFUN([AC_WIRESHARK_STRUCT_ST_FLAGS],
+[AC_CACHE_CHECK([for st_flags in struct stat], ac_cv_wireshark_struct_st_flags,
+[AC_TRY_COMPILE([#include <sys/stat.h>], [struct stat s; s.st_flags;],
+ac_cv_wireshark_struct_st_flags=yes, ac_cv_wireshark_struct_st_flags=no)])
+if test $ac_cv_wireshark_struct_st_flags = yes; then
+  AC_DEFINE(HAVE_ST_FLAGS, 1, [Define if st_flags field exists in struct stat])
+fi
+])
+
+
 #
 # AC_WIRESHARK_STRUCT_SA_LEN
 #
@@ -138,7 +160,7 @@ AC_DEFUN([AC_WIRESHARK_IPV6_STACK],
        v6lib=none
 
        AC_MSG_CHECKING([ipv6 stack type])
-       for i in v6d toshiba kame inria zeta linux linux-glibc solaris8; do
+       for i in v6d toshiba kame inria zeta linux linux-glibc solaris; do
                case $i in
                v6d)
                        AC_EGREP_CPP(yes, [
@@ -206,11 +228,11 @@ yes
 #endif],
                        [v6type=$i; v6lib=inet6; CPPFLAGS="-DINET6 $CPPFLAGS"])
                        ;;
-               solaris8)
-                       if test "`uname -s`" = "SunOS" && test "`uname -r`" = "5.8"; then
+               solaris)
+                       if test "`uname -s`" = "SunOS"; then
                                v6type=$i
                                v6lib=inet6
-                               [CPPFLAGS="-DINET6 -DSOLARIS8_INET6 $CPPFLAGS"]
+                               [CPPFLAGS="-DINET6 $CPPFLAGS"]
                        fi
                        ;;
                esac
@@ -511,7 +533,7 @@ and did you also install that package?]]))
        # header.
        #
        # However, it might also happen on some others OSes with some erroneous
-       # system manipulations where multiple versions of libcap might co-exist
+       # system manipulations where multiple versions of libpcap might co-exist
        # e.g. hand made symbolic link from libpcap.so -> libpcap.so.0.8 but
        # having the pcap header version 0.7.
        #
@@ -742,7 +764,7 @@ AC_DEFUN([AC_WIRESHARK_ZLIB_CHECK],
 # AC_WIRESHARK_LIBLUA_CHECK
 #
 AC_DEFUN([AC_WIRESHARK_LIBLUA_CHECK],[
-
+       lua_ver=5.2
        if test "x$lua_dir" != "x"
        then
                #
@@ -763,11 +785,27 @@ AC_DEFUN([AC_WIRESHARK_LIBLUA_CHECK],[
                LIBS="$LIBS -L$lua_dir/lib -llua -lm"
                wireshark_save_LDFLAGS="$LDFLAGS"
                LDFLAGS="$LDFLAGS -L$lua_dir/lib"
+
+               #
+               # Determine Lua version by reading the LUA_VERSION_NUM definition
+               # from lua.h under the given Lua directory. The value is 501 for
+               # Lua 5.1, 502 for Lua 5.2, etc.
+               #
+               AC_MSG_CHECKING(Lua version)
+               [[ -d "$lua_dir/include" ]] && grep -rq 'LUA_VERSION_NUM.*501' "$lua_dir/include" && lua_ver=5.1
+               AC_MSG_RESULT(Lua ${lua_ver})
        else
                #
                # The user specified no directory in which liblua resides,
-               # so just add "-llua -lliblua" to the used libs.
+               # we try to find out the lua version by looking at pathnames
+               # and we just add "-llua -lliblua" to the used libs.
                #
+               AC_MSG_CHECKING(Lua version)
+               for i in 5.0 5.1 5.2
+               do
+                       [[ -d "/usr/include/lua$i" ]] && lua_ver=$i
+               done
+               AC_MSG_RESULT(Lua ${lua_ver})
                wireshark_save_CPPFLAGS="$CPPFLAGS"
                wireshark_save_LDFLAGS="$LDFLAGS"
                wireshark_save_LIBS="$LIBS"
@@ -780,24 +818,24 @@ AC_DEFUN([AC_WIRESHARK_LIBLUA_CHECK],[
        #
        AC_CHECK_HEADERS(lua.h lualib.h lauxlib.h,,
        [
-               AC_CHECK_HEADERS(lua5.1/lua.h lua5.1/lualib.h lua5.1/lauxlib.h,
+               AC_CHECK_HEADERS(lua${lua_ver}/lua.h lua${lua_ver}/lualib.h lua${lua_ver}/lauxlib.h,
                [
                        if test "x$lua_dir" != "x"
                        then
-                               LUA_INCLUDES="-I$lua_dir/include/lua5.1"
+                               LUA_INCLUDES="-I$lua_dir/include/lua${lua_ver}"
                        else
                                #
                                # The user didn't specify a directory in which liblua resides;
-                               # we must look for the headers in a "lua5.1" subdirectory of
+                               # we must look for the headers in a "lua${lua_ver}" subdirectory of
                                # "/usr/include", "/usr/local/include", or "$prefix/include"
-                               # as some systems apparently put the headers in a "lua5.1"
+                               # as some systems apparently put the headers in a "lua${lua_ver}"
                                # subdirectory.
                                AC_MSG_CHECKING(for extraneous lua header directories)
                                found_lua_dir=""
-                               lua_dir_list="/usr/include/lua5.1 $prefix/include/lua5.1"
+                               lua_dir_list="/usr/include/lua${lua_ver} $prefix/include/lua${lua_ver}"
                                if test "x$ac_cv_enable_usr_local" = "xyes"
                                then
-                                       lua_dir_list="$lua_dir_list /usr/local/include/lua5.1"
+                                       lua_dir_list="$lua_dir_list /usr/local/include/lua${lua_ver}"
                                fi
                                for lua_dir_ent in $lua_dir_list
                                do
@@ -826,8 +864,8 @@ AC_DEFUN([AC_WIRESHARK_LIBLUA_CHECK],[
                                        LUA_LIBS=""
                                        if test "x$want_lua" = "xyes"
                                        then
-                                               # we found lua5.1/lua.h, but we don't know which include dir contains it
-                                               AC_MSG_ERROR(Header file lua.h was found as lua5.1/lua.h but we can't locate the include directory. Please set the DIR for the --with-lua configure parameter.)
+                                               # we found lua${lua_ver}/lua.h, but we don't know which include dir contains it
+                                               AC_MSG_ERROR(Header file lua.h was found as lua${lua_ver}/lua.h but we can't locate the include directory. Please set the DIR for the --with-lua configure parameter.)
                                        else
                                                #
                                                # We couldn't find the header file; don't use the
@@ -835,7 +873,7 @@ AC_DEFUN([AC_WIRESHARK_LIBLUA_CHECK],[
                                                #
                                                want_lua=no
                                        fi
-                               fi
+                               fi
                        fi
                ],
                [
@@ -890,17 +928,16 @@ AC_DEFUN([AC_WIRESHARK_LIBLUA_CHECK],[
                # against libm.
                LIBS="$LIBS $LUA_LIBS -lm"
 
-               AC_CHECK_LIB(lua, luaL_register,
+               AC_CHECK_LIB(lua, luaL_openlibs,
                [
-                   #
-                   #  Lua 5.1 found
-                   #
+                       #
+                       #  Lua found
+                       #
                        if test "x$lua_dir" != "x"
                        then
                                #
-                               # Put the "-I" and "-L" flags for lua at
-                               # the beginning of CFLAGS, CPPFLAGS,
-                               # LDFLAGS, and LIBS.
+                               # Put the "-I" and "-L" flags for lua into
+                               # LUA_INCLUDES and LUA_LIBS, respectively.
                                #
                                LUA_LIBS="-L$lua_dir/lib -llua -lm"
                                LUA_INCLUDES="-I$lua_dir/include"
@@ -908,7 +945,7 @@ AC_DEFUN([AC_WIRESHARK_LIBLUA_CHECK],[
                                LUA_LIBS="-llua -lm"
                                LUA_INCLUDES=""
                        fi
-                       AC_DEFINE(HAVE_LUA_5_1, 1, [Define to use Lua 5.1])
+                       AC_DEFINE(HAVE_LUA, 1, [Define to use Lua])
                        want_lua=yes
 
                ],[
@@ -916,15 +953,15 @@ AC_DEFUN([AC_WIRESHARK_LIBLUA_CHECK],[
                        # We could not find the libs, maybe we have version number in the lib name
                        #
 
-                       LIBS="$wireshark_save_LIBS -llua5.1 -lm"
+                       LIBS="$wireshark_save_LIBS -llua${lua_ver} -lm"
 
-                       AC_CHECK_LIB(lua5.1, luaL_register,
+                       AC_CHECK_LIB(lua${lua_ver}, luaL_openlibs,
                        [
                            #
-                           #  Lua 5.1 found
+                           #  Lua found
                            #
-                           LUA_LIBS=" -llua5.1 -lm"
-                           AC_DEFINE(HAVE_LUA_5_1, 1, [Define to use Lua 5.1])
+                           LUA_LIBS=" -llua${lua_ver} -lm"
+                           AC_DEFINE(HAVE_LUA, 1, [Define to use Lua])
                            want_lua=yes
                        ],[
                                #
@@ -1053,9 +1090,9 @@ AC_DEFUN([AC_WIRESHARK_LIBPORTAUDIO_CHECK],[
                        if test "x$portaudio_dir" != "x"
                        then
                                #
-                               # Put the "-I" and "-L" flags for portaudio at
-                               # the beginning of CFLAGS, CPPFLAGS,
-                               # LDFLAGS, and LIBS.
+                               # Put the "-I" and "-L" flags for portaudio
+                               # into PORTAUDIO_INCLUDES and PORTAUDIO_LIBS,
+                               # respectively.
                                #
                                PORTAUDIO_LIBS="-L$portaudio_dir/lib -lportaudio"
                                PORTAUDIO_INCLUDES="-I$portaudio_dir/include"
@@ -1285,7 +1322,7 @@ AC_DEFUN([AC_WIRESHARK_KRB5_CHECK],
                    KRB5_LIBS=`echo $KRB5_LIBS | sed 's/-lcrypto//'`
                    KRB5_LIBS="$KRB5_LIBS $SSL_LIBS"
                else
-                   AC_MSG_ERROR([Kerberos library requires -lcrypto but --with-ssl not specified])
+                   AC_MSG_ERROR([Kerberos library requires -lcrypto, so you must specify --with-ssl])
                fi
                ;;
            esac
@@ -1543,11 +1580,115 @@ else
 fi
 ])
 
+dnl
+dnl Check whether, if you pass an unknown warning option to the
+dnl compiler, it fails or just prints a warning message and succeeds.
+dnl Set ac_wireshark_unknown_warning_option_error to the appropriate flag
+dnl to force an error if it would otherwise just print a warning message
+dnl and succeed.
+dnl
+AC_DEFUN([AC_WIRESHARK_CHECK_UNKNOWN_WARNING_OPTION_ERROR],
+    [
+       AC_MSG_CHECKING([whether the compiler fails when given an unknown warning option])
+       save_CFLAGS="$CFLAGS"
+       CFLAGS="$CFLAGS -Wxyzzy-this-will-never-succeed-xyzzy"
+       AC_TRY_COMPILE(
+           [],
+           [return 0],
+           [
+               AC_MSG_RESULT([no, adding -Werror=unknown-warning-option])
+               #
+               # We're assuming this is clang, where
+               # -Werror=unknown-warning-option is the appropriate
+               # option to force the compiler to fail.
+               # 
+               ac_wireshark_unknown_warning_option_error="-Werror=unknown-warning-option"
+           ],
+           [
+               AC_MSG_RESULT([yes])
+           ])
+       CFLAGS="$save_CFLAGS"
+    ])
+
+dnl
+dnl Check whether, if you pass a valid-for-C-but-not-C++ option to the
+dnl compiler, it fails or just prints a warning message and succeeds.
+dnl Set ac_wireshark_non_cxx_warning_option_error to the appropriate flag
+dnl to force an error if it would otherwise just print a warning message
+dnl and succeed.
+dnl
+AC_DEFUN([AC_WIRESHARK_CHECK_NON_CXX_WARNING_OPTION_ERROR],
+    [
+       AC_MSG_CHECKING([whether the compiler fails when given an warning option not supported for C++])
+       #
+       # Some C+ compilers warn about -Wmissing-prototypes, and some warn
+       # about -Wmissing-declarations.  Check both.
+       #
+       AC_LANG_PUSH(C++)
+       save_CXXFLAGS="$CXXFLAGS"
+       for flag in -Wmissing-prototypes -Wmissing-declarations; do
+           CXXFLAGS="$save_CXXFLAGS $flag"
+           AC_TRY_COMPILE(
+               [],
+               [return 0],
+               [
+                   #
+                   # We're assuming this is g++, where -Werror is the
+                   # appropriate option to force the compiler to fail.
+                   # Check whether it fails with -Werror.
+                   #
+                   # NOTE: it's important to put -Werror *before*
+                   # the flag, otherwise, when it sees the flag,
+                   # it doesn't yet know that warnings should be
+                   # treated as errors, and doesn't treat the
+                   # "that's C-only" warning as an error.
+                   #
+                   CXXFLAGS="$save_CXXFLAGS -Werror $flag"
+                   AC_TRY_COMPILE(
+                       [],
+                       [return 0],
+                       [
+                           #
+                           # No, so this option is actually OK
+                           # with our C++ compiler.
+                           #
+                           # (We need an empty command here to
+                           # prevent some versions of autoconf
+                           # from generating a script with an
+                           # empty "then" clause for an if statement.)
+                           #
+                           :
+                       ],
+                       [
+                           #
+                           # Yes, so we need -Werror for the tests.
+                           #
+                           ac_wireshark_non_cxx_warning_option_error="-Werror"
+                           break
+                       ])
+               ])
+       done
+       CXXFLAGS="$save_CXXFLAGS"
+       AC_LANG_POP
+       if test x$ac_wireshark_non_cxx_warning_option_error = x; then
+           AC_MSG_RESULT([yes])
+       else
+           AC_MSG_RESULT([no, adding -Werror])
+       fi
+    ])
+
 #
-# AC_WIRESHARK_GCC_CFLAGS_CHECK
+# AC_WIRESHARK_COMPILER_FLAGS_CHECK
 #
-# $1 : cflags to test
+# $1 : flags to test
 # $2 : if supplied, C for C-only flags, CXX for C++-only flags
+# $3 : if supplied, a program to try to compile with the flag
+#      and, if the compile fails when -Werror is turned on,
+#      we don't add the flag - used for warning flags that
+#      issue incorrect or non-useful warnings with some
+#      compiler versions
+# $4 : must be supplied if $3 is supplied - a message describing
+#      for what the test program is testing
 #
 # The macro first determines if the compiler supports GCC-style flags.
 # Then it attempts to compile with the defined cflags.  The defined
 # We do this because not all such options are necessarily supported by
 # the version of the particular compiler we're using.
 #
-# NOTE: clang, by default, only warns about unknown -W options.
-# If we're using clang, we turn on -Werror=unknown-warning-option
-# so that it fails if we pass it a -W option it doesn't know about
-# but doesn't fail for any other warning that the test program might
-# produce.
-#
-AC_DEFUN([AC_WIRESHARK_GCC_CFLAGS_CHECK],
+AC_DEFUN([AC_WIRESHARK_COMPILER_FLAGS_CHECK],
 [GCC_OPTION="$1"
-case "$2" in
-C)
-  AC_MSG_CHECKING(whether we can add $GCC_OPTION to CFLAGS)
-  ;;
-
-CXX)
-  AC_MSG_CHECKING(whether we can add $GCC_OPTION to CXXFLAGS)
-  ;;
-
-*)
-  AC_MSG_CHECKING(whether we can add $GCC_OPTION to CFLAGS and CXXFLAGS)
-  ;;
-esac
-
+can_add_to_cflags=""
+can_add_to_cxxflags=""
 if test "x$ac_supports_gcc_flags" = "xyes" ; then
   if test "$2" != CXX ; then
     #
     # Not C++-only; if this can be added to the C compiler flags, add them.
     #
+    # If the option begins with "-W", add
+    # $ac_wireshark_unknown_warning_option_error to make sure that
+    # we'll get an error if it's an unknown warning option; not all
+    # compilers treat unknown warning options as errors (I'm looking at
+    # you, clang).
+    #
+    # If the option begins with "-f" or "-m", add -Werror to make sure
+    # that we'll get an error if we get "argument unused during compilation"
+    # warnings, as those will either cause a failure for files compiled
+    # with -Werror or annoying noise for files compiled without it.
+    # (Yeah, you, clang.)
+    #
+    AC_MSG_CHECKING(whether we can add $GCC_OPTION to CFLAGS)
     CFLAGS_saved="$CFLAGS"
-    CFLAGS="$CFLAGS $GCC_OPTION"
-    if test "x$CC" = "xclang" ; then
-      #
-      # Force clang to fail on an unknown warning option; by default,
-      # it whines but doesn't fail, so we add unknown options and,
-      # as a result, get a lot of that whining when we compile.
-      #
-      CFLAGS="$CFLAGS -Werror=unknown-warning-option"
+    if expr "x$GCC_OPTION" : "x-W.*" >/dev/null
+    then
+      CFLAGS="$CFLAGS $ac_wireshark_unknown_warning_option_error $GCC_OPTION"
+    elif expr "x$GCC_OPTION" : "x-f.*" >/dev/null
+    then
+      CFLAGS="$CFLAGS -Werror $GCC_OPTION"
+    elif expr "x$GCC_OPTION" : "x-m.*" >/dev/null
+    then
+      CFLAGS="$CFLAGS -Werror $GCC_OPTION"
+    else
+      CFLAGS="$CFLAGS $GCC_OPTION"
     fi
-    AC_COMPILE_IFELSE([
-      AC_LANG_SOURCE([[
-                        int foo;
-                    ]])],
-                    [
-                      AC_MSG_RESULT(yes)
-                      #
-                      # Remove -Werror=unknown-warning-option, if we
-                      # added it, by setting CFLAGS to the saved value
-                      # plus just the new option.
-                      #
-                      CFLAGS="$CFLAGS_saved $GCC_OPTION"
-                      if test "$2" != C ; then
-                        #
-                        # Add it to the C++ flags as well.
-                        #
-                        CXXFLAGS="$CXXFLAGS $GCC_OPTION"
-                      fi
-                    ],
-                    [
-                      AC_MSG_RESULT(no)
-                      CFLAGS="$CFLAGS_saved"
-                    ])
-  else
+    AC_COMPILE_IFELSE(
+      [
+        AC_LANG_SOURCE([[int foo;]])
+      ],
+      [
+        AC_MSG_RESULT(yes)
+        can_add_to_cflags=yes
+        #
+        # OK, do we have a test program?  If so, check
+        # whether it fails with this option and -Werror,
+        # and, if so, don't include it.
+        #
+        # We test arg 4 here because arg 3 is a program which
+        # could contain quotes (breaking the comparison).
+        #
+        if test "x$4" != "x" ; then
+          CFLAGS="$CFLAGS -Werror"
+          AC_MSG_CHECKING(whether $GCC_OPTION $4)
+          AC_COMPILE_IFELSE(
+           [AC_LANG_SOURCE($3)],
+            [
+              AC_MSG_RESULT(no)
+              #
+              # Remove "force an error for a warning" options, if we
+              # added them, by setting CFLAGS to the saved value plus
+              # just the new option.
+              #
+              CFLAGS="$CFLAGS_saved $GCC_OPTION"
+              #
+              # Add it to the flags we use when building build tools.
+              #
+              CFLAGS_FOR_BUILD="$CFLAGS_FOR_BUILD $GCC_OPTION"
+            ],
+            [
+              AC_MSG_RESULT(yes)
+              CFLAGS="$CFLAGS_saved"
+            ])
+        else
+          #
+          # Remove "force an error for a warning" options, if we
+          # added them, by setting CFLAGS to the saved value plus
+          # just the new option.
+          #
+          CFLAGS="$CFLAGS_saved $GCC_OPTION"
+          #
+          # Add it to the flags we use when building build tools.
+          #
+          CFLAGS_FOR_BUILD="$CFLAGS_FOR_BUILD $GCC_OPTION"
+        fi
+      ],
+      [
+        AC_MSG_RESULT(no)
+        can_add_to_cflags=no
+        CFLAGS="$CFLAGS_saved"
+      ])
+  fi
+  if test "$2" != C ; then
     #
-    # C++-only; if this can be added to the C++ compiler flags, add them.
+    # Not C-only; if this can be added to the C++ compiler flags, add them.
     #
+    # If the option begins with "-W", add
+    # $ac_wireshark_unknown_warning_option_error, as per the above, and
+    # also add $ac_wireshark_non_cxx_warning_option_error, because at
+    # lease some versions of g++ whine about -Wmissing-prototypes, the
+    # fact that at least one of those versions refuses to warn about
+    # function declarations without an earlier declaration nonwithstanding;
+    # perhaps there's a reason not to warn about that with C++ even though
+    # warning about it can be a Good Idea with C, but it's not obvious to
+    # me).
+    #
+    # If the option begins with "-f" or "-m", add -Werror to make sure
+    # that we'll get an error if we get "argument unused during compilation"
+    # warnings, as those will either cause a failure for files compiled
+    # with -Werror or annoying noise for files compiled without it.
+    # (Yeah, you, clang++.)
+    #
+    AC_MSG_CHECKING(whether we can add $GCC_OPTION to CXXFLAGS)
     CXXFLAGS_saved="$CXXFLAGS"
-    CXXFLAGS="$CXXFLAGS $GCC_OPTION"
-    if test "x$CC" = "xclang" ; then
-      CXXFLAGS="$CXXFLAGS -Werror=unknown-warning-option"
+    if expr "x$GCC_OPTION" : "x-W.*" >/dev/null
+    then
+      CXXFLAGS="$CXXFLAGS $ac_wireshark_unknown_warning_option_error $ac_wireshark_non_cxx_warning_option_error $GCC_OPTION"
+    elif expr "x$GCC_OPTION" : "x-f.*" >/dev/null
+    then
+      CXXFLAGS="$CXXFLAGS -Werror $GCC_OPTION"
+    elif expr "x$GCC_OPTION" : "x-m.*" >/dev/null
+    then
+      CXXFLAGS="$CXXFLAGS -Werror $GCC_OPTION"
+    else
+      CXXFLAGS="$CXXFLAGS $GCC_OPTION"
     fi
     AC_LANG_PUSH([C++])
-    AC_COMPILE_IFELSE([
-      AC_LANG_SOURCE([[
-                        int foo;
-                    ]])],
-                    [
-                      AC_MSG_RESULT(yes)
-                    ],
-                    [
-                      AC_MSG_RESULT(no)
-                      CXXFLAGS="$CXXFLAGS_saved"
-                    ])
+    AC_COMPILE_IFELSE(
+      [
+        AC_LANG_SOURCE([[int foo;]])
+      ],
+      [
+        AC_MSG_RESULT(yes)
+        can_add_to_cxxflags=yes
+        #
+        # OK, do we have a test program?  If so, check
+        # whether it fails with this option and -Werror,
+        # and, if so, don't include it.
+        #
+        # We test arg 4 here because arg 3 is a program which
+        # could contain quotes (breaking the comparison).
+        #
+        if test "x$4" != "x" ; then
+          CXXFLAGS="$CXXFLAGS -Werror"
+          AC_MSG_CHECKING(whether $GCC_OPTION $4)
+          AC_COMPILE_IFELSE(
+            [AC_LANG_SOURCE($3)],
+            [
+              AC_MSG_RESULT(no)
+              #
+              # Remove "force an error for a warning" options, if we
+              # added them, by setting CXXFLAGS to the saved value plus
+              # just the new option.
+              #
+              CXXFLAGS="$CXXFLAGS_saved $GCC_OPTION"
+            ],
+            [
+              AC_MSG_RESULT(yes)
+              CXXFLAGS="$CXXFLAGS_saved"
+            ])
+        else
+          #
+          # Remove "force an error for a warning" options, if we
+          # added them, by setting CXXFLAGS to the saved value plus
+          # just the new option.
+          #
+          CXXFLAGS="$CXXFLAGS_saved $GCC_OPTION"
+        fi
+      ],
+      [
+        AC_MSG_RESULT(no)
+        can_add_to_cxxflags=no
+        CXXFLAGS="$CXXFLAGS_saved"
+      ])
     AC_LANG_POP([C++])
   fi
-else
-  AC_MSG_RESULT(no)
+  if test "(" "$can_add_to_cflags" = "yes" -a "$can_add_to_cxxflags" = "no" ")" \
+       -o "(" "$can_add_to_cflags" = "no" -a "$can_add_to_cxxflags" = "yes" ")"
+  then
+    #
+    # Confusingly, some C++ compilers like -Wmissing-prototypes but
+    # don't like -Wmissing-declarations and others like
+    # -Wmissing-declarations but don't like -Wmissing-prototypes,
+    # the fact that the corresponding C compiler likes both.  Don't
+    # warn about them.
+    #
+    if test "(" x$GCC_OPTION != x-Wmissing-prototypes ")" \
+         -a "(" x$GCC_OPTION != x-Wmissing-declarations ")"
+    then
+       AC_MSG_WARN([$CC and $CXX appear to be a mismatched pair])
+    fi
+  fi
+fi
+])
+
+# AC_WIRESHARK_GCC_FORTIFY_SOURCE_CHECK
+#
+# Checks if '-D_FORTIFY_SOURCE=...' is OK to use in CPPFLAGS.
+#  Use '-D_FORTIFY_SOURCE=...' in CPPFLAGS only if the GCC 'optimization level' is > 0.
+#  The use of '-D_FORTIFY_SOURCE=...' will cause a warning with at least some versions
+#    of glibc if the  GCC "optimization level" is 0 (default or -O or -O0)
+#    when using GCC to compile a source file which references the macro definition.
+#
+# See: http://gcc.gnu.org/ml/gcc-patches/2004-09/msg02055.html
+# See: http://sourceware.org/bugzilla/show_bug.cgi?id=13979
+#
+#   We'll use '-D_FORTIFY_SOURCE=2' only if there's no warning; Among other things this means
+#    that the  use of '-D_FORTIFY_SOURCE=2' with '-Werror' and '-O0' won't cause
+#    the compiler to stop on error.
+#   Assumption: CFLAGS already contains whatever optimization option including none) is
+#    to be used.
+#
+
+AC_DEFUN([AC_WIRESHARK_GCC_FORTIFY_SOURCE_CHECK],
+[
+if test "x$GCC" = "xyes" -o "x$CC" = "xclang" ; then
+  AC_MSG_CHECKING([whether -D_FORTIFY_SOURCE=... can be used (without generating a warning)])
+  CFLAGS_saved="$CFLAGS"
+  CPPFLAGS_saved="$CPPFLAGS"
+  CFLAGS="$CFLAGS -Werror"
+  CPPFLAGS="$CPPFLAGS -D_FORTIFY_SOURCE=2"
+  AC_COMPILE_IFELSE([
+    AC_LANG_SOURCE([[
+                  #include <stdio.h>
+                      int foo;
+                  ]])],
+                  [
+                    AC_MSG_RESULT(yes)
+                    #
+                    # (CPPFLAGS contains _D_FORTIFY_SOURCE=2)
+                    #
+                  ],
+                  [
+                    AC_MSG_RESULT(no)
+                    # Remove -D_FORTIFY_SOURCE=2
+                    CPPFLAGS="$CPPFLAGS_saved"
+                  ])
+  CFLAGS="$CFLAGS_saved"
 fi
 ])
 
@@ -1650,14 +1943,20 @@ fi
 # Checks for the presence of OS X integration functions in the GTK+ framework
 # or as a separate library.
 #
-# http://sourceforge.net/apps/trac/gtk-osx/wiki/Integrate
+# GTK+ for MAC OS X now lives on www.gtk.org at:
+#
+#   http://www.gtk.org/download/macos.php
+#
+# Details on building with GTK-OSX are available at:
+#
+#   http://live.gnome.org/GTK%2B/OSX/Building
+#
+# The GTK-OSX library has been renamed to gtkmacintegration.
+# It was previously named igemacintegration.
 #
 # http://live.gnome.org/GTK%2B/OSX/Integration
 #    for the old Carbon-based integration functions
 #
-# http://gtk-osx.sourceforge.net/ige-mac-integration/
-#    for the new Cocoa-based integration functions
-#
 AC_DEFUN([AC_WIRESHARK_OSX_INTEGRATION_CHECK],
 [
        ac_save_CFLAGS="$CFLAGS"
@@ -1666,17 +1965,17 @@ AC_DEFUN([AC_WIRESHARK_OSX_INTEGRATION_CHECK],
        LIBS="$GTK_LIBS $LIBS"
 
        #
-       # Check for the new integration functions in a -ligemacintegration
+       # Check for the new integration functions in a -lgtkmacintegration
        # library.
        #
-       AC_CHECK_LIB(igemacintegration, gtk_osxapplication_set_menu_bar,
+       AC_CHECK_LIB(gtkmacintegration, gtkosx_application_set_menu_bar,
        [
                AC_DEFINE(HAVE_GTKOSXAPPLICATION, 1,
-                       [Define to 1 if -ligemacintegration includes the GtkOSXApplication Integration functions.])
+                       [Define to 1 if -lgtkmacintegration includes the GtkOSXApplication Integration functions.])
                have_ige_mac=yes
                # We don't want gtk stuff in LIBS (which is reset below) so
                # manually set GTK_LIBS (which is more appropriate)
-               GTK_LIBS="$GTK_LIBS -ligemacintegration"
+               GTK_LIBS="$GTK_LIBS -lgtkmacintegration"
        ])
 
        if test x$have_ige_mac = x
@@ -1685,7 +1984,7 @@ AC_DEFUN([AC_WIRESHARK_OSX_INTEGRATION_CHECK],
                # Not found - check for the old integration functions in
                # the Gtk framework.
                #
-               AC_CHECK_LIB(Gtk, ige_mac_menu_set_menu_bar,
+               AC_CHECK_LIB(Gtk, gtk_mac_menu_set_menu_bar,
                [
                        AC_DEFINE(HAVE_IGE_MAC_INTEGRATION, 1,
                                [Define to 1 if the the Gtk+ framework or a separate library includes the Imendio IGE Mac OS X Integration functions.])
@@ -1700,99 +1999,139 @@ AC_DEFUN([AC_WIRESHARK_OSX_INTEGRATION_CHECK],
        then
                #
                # Not found - check for the old integration functions in
-               # a -ligemacintegration library.
+               # a -lgtkmacintegration library.
                #
-               AC_CHECK_LIB(igemacintegration, ige_mac_menu_set_menu_bar,
+               AC_CHECK_LIB(gtkmacintegration, gtk_mac_menu_set_menu_bar,
                [
                        AC_DEFINE(HAVE_IGE_MAC_INTEGRATION, 1,
                                [Define to 1 if the the Gtk+ framework or a separate library includes the Imendio IGE Mac OS X Integration functions.])
                        have_ige_mac=yes
                        # We don't want gtk stuff in LIBS (which is reset below) so
                        # manually set GTK_LIBS (which is more appropriate)
-                       GTK_LIBS="$GTK_LIBS -ligemacintegration"
+                       GTK_LIBS="$GTK_LIBS -lgtkmacintegration"
                ])
        fi
        CFLAGS="$ac_save_CFLAGS"
        LIBS="$ac_save_LIBS"
 ])
 
-#
-# AC_WIRESHARK_PYTHON_CHECK
-#
-# Check whether python devel package is present
-#
-AC_DEFUN([AC_WIRESHARK_PYTHON_CHECK],
-  [
-    #
-    # Checking whether we have a python devel environment available
-    #
-#  AC_CACHE_CHECK([checking python devel package], ac_cv_wireshark_python_devel,
-#    [
-    AC_CHECK_PROG([ac_ws_python_config], python-config, "yes", "no")
-    if test "x$ac_ws_python_config" = "xno"; then
-      ac_cv_wireshark_python_devel=no
-        if test "x$want_python" = "xyes"
-        then
-            #
-            # The user tried to force us to use Python, but we
-            # couldn't find the python-config tool; report an error.
-            #
-            AC_MSG_ERROR("python-config not found")
-        fi
-        #
-        # Set want_python to no, so we report that we aren't using
-        # the Python interpreter.
-        #
-        want_python=no
-    else
-      AC_MSG_CHECKING([python devel])
-      ac_save_ws_cflags=$CFLAGS
-      ac_save_ws_libs=$LIBS
-      CFLAGS=$(python-config --includes)
-      LIBS=$(python-config --ldflags)
-      AC_COMPILE_IFELSE(
-        [
-          AC_LANG_PROGRAM(
-            [[#include <Python.h>]],
-            [[Py_Initialiaze();]]
-          )
-        ],
-        [
-          #
-          # Compilation successful, we have python devel available
-          #
-          ac_cv_wireshark_python_devel=yes
-          PY_LIBS=$LIBS
-          PY_CFLAGS=$CFLAGS
-          AC_SUBST(PY_LIBS)
-          AC_SUBST(PY_CFLAGS)
-          CFLAGS="$ac_save_ws_cflags"
-          LIBS="$ac_save_ws_libs"
-          AC_DEFINE(HAVE_PYTHON, 1, [Define if python devel package available])
-          AC_MSG_RESULT([yes])
-        ],
-        [
-          #
-          # Compilation unsuccessful, python devel not available
-          #
-          ac_cv_wireshark_python_devel=no
-          CFLAGS=$ac_save_ws_cflags
-          LIBS=$ac_save_ws_libs
-          if test "x$want_python" = "xyes"
-          then
-            #
-            # The user tried to force us to use Python, but we
-            # couldn't compile the test program; report an error.
-            #
-            AC_MSG_ERROR("Python test program failed compilation")
-          fi
-          AC_MSG_RESULT([no])
-          #
-          # Set want_python to no, so we report that we aren't using
-          # the Python interpreter.
-          #
-          want_python=no
-        ])
-    fi
-#    ])
+# Based on AM_PATH_GTK in gtk-2.0.m4.
+
+dnl AC_WIRESHARK_QT_MODULE_CHECK([MODULE, MINIMUM-VERSION, [ACTION-IF-FOUND,
+dnl     [ACTION-IF-NOT-FOUND]]])
+dnl Test for a particular Qt module and add the flags and libraries
+dnl for it to Qt_CFLAGS and Qt_LIBS.
+dnl
+AC_DEFUN([AC_WIRESHARK_QT_MODULE_CHECK],
+[
+       #
+       # Version of the module we're checking for.
+       # Default to 4.0.0.
+       #
+       min_qt_version=ifelse([$2], ,4.0.0,$2)
+
+       #
+       # Prior to Qt 5, modules were named QtXXX.
+       # In Qt 5, they're named Qt5XXX.
+       #
+       # Try the Qt 5 version first.
+       # (And be prepared to add Qt6 at some point....)
+       #
+       for modprefix in Qt5 Qt
+       do
+               pkg_config_module="${modprefix}$1"
+               AC_MSG_CHECKING(for $pkg_config_module - version >= $min_qt_version)
+               if $PKG_CONFIG --atleast-version $min_qt_version $pkg_config_module; then
+                       mod_version=`$PKG_CONFIG --modversion $pkg_config_module`
+                       AC_MSG_RESULT(yes (version $mod_version))
+                       Qt_CFLAGS="$Qt_CFLAGS `$PKG_CONFIG --cflags $pkg_config_module`"
+                       Qt_LIBS="$Qt_LIBS `$PKG_CONFIG --libs $pkg_config_module`"
+                       found_$1=yes
+                       break
+               else
+                       AC_MSG_RESULT(no)
+               fi
+       done
+
+       if test "x$found_$1" = "xyes"; then
+               # Run Action-If-Found
+               ifelse([$3], , :, [$3])
+       else
+               # Run Action-If-Not-Found
+               ifelse([$4], , :, [$4])
+       fi
+])
+
+dnl AC_WIRESHARK_QT_CHECK([MINIMUM-VERSION, [ACTION-IF-FOUND,
+dnl     [ACTION-IF-NOT-FOUND]]])
+dnl Test for Qt and define Qt_CFLAGS and Qt_LIBS.
+dnl
+AC_DEFUN([AC_WIRESHARK_QT_CHECK],
+[
+       no_qt=""
+
+       AC_PATH_PROG(PKG_CONFIG, pkg-config, no)
+
+       if test x$PKG_CONFIG != xno ; then
+               if pkg-config --atleast-pkgconfig-version 0.7 ; then
+                       :
+               else
+                       echo *** pkg-config too old; version 0.7 or better required.
+                       no_qt=yes
+                       PKG_CONFIG=no
+               fi
+       else
+               no_qt=yes
+       fi
+
+       if test x"$no_qt" = x ; then
+               #
+               # OK, we have an adequate version of pkg-config.
+               #
+               # Check for the Core module; if we don't have that,
+               # we don't have Qt.
+               #
+               AC_WIRESHARK_QT_MODULE_CHECK(Core, $1, , [no_qt=yes])
+       fi
+
+       if test x"$no_qt" = x ; then
+               #
+               # We need the Gui module as well.
+               #
+               AC_WIRESHARK_QT_MODULE_CHECK(Gui, $1, , [no_qt=yes])
+       fi
+
+       if test x"$no_qt" = x ; then
+               #
+               # Qt 5.0 appears to move the widgets out of Qt GUI
+               # to Qt Widgets; look for the Widgets module, but
+               # don't fail if we don't have it.
+               #
+               AC_WIRESHARK_QT_MODULE_CHECK(Widgets, $1)
+
+               #
+               # Qt 5.0 also appears to move the printing support into
+               # the Qt PrintSupport module.
+               #
+               AC_WIRESHARK_QT_MODULE_CHECK(PrintSupport, $1)
+
+               #
+               # While we're at it, look for QtMacExtras.  (Presumably
+               # if we're not building for OS X, it won't be present.)
+               #
+               # XXX - is there anything in QtX11Extras or QtWinExtras
+               # that we should be using?
+               #
+               AC_WIRESHARK_QT_MODULE_CHECK(MacExtras, $1,
+                       AC_DEFINE(QT_MACEXTRAS_LIB, 1, [Define if we have QtMacExtras]))
+
+               AC_SUBST(Qt_LIBS)
+
+               # Run Action-If-Found
+               ifelse([$2], , :, [$2])
+       else
+               # Run Action-If-Not-Found
+               ifelse([$3], , :, [$3])
+       fi
+
 ])