Move common predefined macros to config.h and common.am

Also, __USE_UNIX98 is a libc-internal definition. The build system is
not supposed to define that directly (we have _GNU_SOURCE).

configure.ac

@@ -57,7 +57,11 @@ dnl Check for tools
 dnl
 AC_PROG_CC_C99
 AC_USE_SYSTEM_EXTENSIONS
-AC_DEFINE([_FORTIFY_SOURCE], 2, [Define to '2' to get glibc warnings.])
+AC_DEFINE([_FORTIFY_SOURCE], 2, [Define to 2 to get glibc warnings.])
+AC_DEFINE([_FILE_OFFSET_BITS], 64, [Define to 64 for large files support.])
+AC_DEFINE([_REENTRANT],, [Define to expose reentrant functions.])
+AC_DEFINE([_THREAD_SAFE],, [Same as _REENTANT for some other OSes.])
+AC_DEFINE([__LIBVLC__],, [Define within the LibVLC source code tree.])
 
 AM_PROG_CC_C_O
 AC_PROG_CXX

modules/common.am

@@ -13,6 +13,7 @@ CLEANFILES = $(BUILT_SOURCES)
 
 LTLIBVLCCORE = $(top_builddir)/src/libvlccore.la
 
+AM_CPPFLAGS = -D__PLUGIN__
 AM_CFLAGS = `$(VLC_CONFIG) --cflags plugin $@`
 AM_CXXFLAGS = `$(VLC_CONFIG) --cxxflags plugin $@`
 AM_OBJCFLAGS = `$(VLC_CONFIG) --objcflags plugin $@`

src/check_headers

@@ -8,6 +8,7 @@ cd "$(dirname "$0")" || exit $?
 regexp="$(cat ../config.h.in | \
 	sed -n -e 's/^#undef \([A-Z0-9_]*\)$/\1/p' | \
 	grep -v 'WORDS_BIGENDIAN' | \
+	grep -v '__LIBVLC__' | \
 	xargs | \
     sed -e 's/ /\\\(\\s\\\|$\\\)\\\| /g')"
 regexp=" $regexp\$"

src/vlc-plugin.pc.in

@@ -10,7 +10,6 @@ Version: @VERSION@
 Cflags: -I${includedir} -I${pkgincludedir}/plugins \
 	-D__PLUGIN__ \
 	-D_FILE_OFFSET_BITS=64 \
-	-D__USE_UNIX98 \
 	@DEFS_BIGENDIAN@ \
 	-D_REENTRANT \
 	-D_THREAD_SAFE

vlc-config.in.in

@@ -36,7 +36,6 @@ Options:
         [--objcflags]             output Objective C compilation flags
 Modules:
         vlc                       the main VLC object
-        plugin                    flags for plugin modules
         MODULE                    any available module (dummy, gtk, avi, etc.)
         libs                      flags for external libs
 BLAH
@@ -65,11 +64,6 @@ includes="${includes}"
 cppflags="${includes}"
 module=""
 
-#
-#  On Linux and Solaris, activate 64-bit off_t (by default under BSD)
-#
-cppflags="${cppflags} -D_FILE_OFFSET_BITS=64 -D__USE_UNIX98 -D_REENTRANT -D_THREAD_SAFE"
-
 #
 #  Various additional defines
 #
@@ -151,11 +145,9 @@ while test $# -gt 0; do
       usage 1 1>&1
       ;;
     libvlccore)
-      cppflags="${cppflags} -D__LIBVLC__ -I${top_builddir}src/misc"
       ;;
     plugin)
       echo_plugin=yes
-      cppflags="${cppflags} -D__LIBVLC__ -D__PLUGIN__"
       ;;
     *)
       module="$tgt"