[gl_gcc_warnings=no]
)
-AC_ARG_ENABLE(link-time-optimization,
-[AS_HELP_STRING([--enable-link-time-optimization],
- [build emacs with link-time optimization.
- This is supported only for GCC since 4.5.0.])],
-if test "${enableval}" != "no"; then
- AC_MSG_CHECKING([whether link-time optimization is supported])
- ac_lto_supported=no
- if test x$GCC = xyes; then
- CPUS=`getconf _NPROCESSORS_ONLN 2>/dev/null`
- if test x$CPUS != x; then
- LTO="-flto=$CPUS"
- else
- LTO="-flto"
- fi
- old_CFLAGS=$CFLAGS
- CFLAGS="$CFLAGS $LTO"
- AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[]], [[]])],
- [ac_lto_supported=yes], [ac_lto_supported=no])
- CFLAGS="$old_CFLAGS"
- fi
- AC_MSG_RESULT([$ac_lto_supported])
- if test "$ac_lto_supported" = "yes"; then
- CFLAGS="$CFLAGS $LTO"
- fi
-fi)
-
# clang is unduly picky about some things.
AC_CACHE_CHECK([whether the compiler is clang], [emacs_cv_clang],
[AC_COMPILE_IFELSE(
s/^ //
"
-
+AC_ARG_ENABLE(link-time-optimization,
+[AS_HELP_STRING([--enable-link-time-optimization],
+ [build emacs with link-time optimization.
+ This is supported for gcc since 4.5.0 and clang.
+ Note that clang support is experimental - see INSTALL])],
+if test "${enableval}" != "no"; then
+ ac_lto_supported=no
+ if test $emacs_cv_clang = yes; then
+ AC_MSG_CHECKING([whether link-time optimization is supported by clang])
+ GOLD_PLUGIN=`$CC -print-file-name=LLVMgold.so 2>/dev/null`
+ if test -x "$GOLD_PLUGIN"; then
+ LTO="-flto"
+ fi
+ elif test x$GCC = xyes; then
+ AC_MSG_CHECKING([whether link-time optimization is supported by gcc])
+ CPUS=`getconf _NPROCESSORS_ONLN 2>/dev/null`
+ if test x$CPUS != x; then
+ LTO="-flto=$CPUS"
+ else
+ LTO="-flto"
+ fi
+ else
+ AC_MSG_ERROR([Link-time optimization is not supported with your compiler.])
+ fi
+ if test -z "$LTO"; then
+ ac_lto_supported=no
+ else
+ old_CFLAGS=$CFLAGS
+ CFLAGS="$CFLAGS $LTO"
+ AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[]], [[]])],
+ [ac_lto_supported=yes], [ac_lto_supported=no])
+ CFLAGS="$old_CFLAGS"
+ fi
+ AC_MSG_RESULT([$ac_lto_supported])
+ if test "$ac_lto_supported" = "yes"; then
+ CFLAGS="$CFLAGS $LTO"
+ if test x$emacs_cv_clang = xyes; then
+ AC_MSG_WARN([Please read INSTALL before using link-time optimization with clang])
+ # WARNING: 'ar --plugin ...' doesn't work without
+ # command, so plugin name is appended to ARFLAGS.
+ ARFLAGS="cru --plugin $GOLD_PLUGIN"
+ RANLIB="$RANLIB --plugin $GOLD_PLUGIN"
+ fi
+ fi
+fi)
dnl Some other nice autoconf tests.
dnl These are commented out, since gl_EARLY and/or Autoconf already does them.
dnl EMACS_CHECK_MODULES(GSTUFF, gtk+-2.0 >= 1.3 glib = 1.3.4)
dnl acts like PKG_CHECK_MODULES(GSTUFF, gtk+-2.0 >= 1.3 glib = 1.3.4,
dnl HAVE_GSTUFF=yes, HAVE_GSTUFF=no) -- see pkg-config man page --
-dnl except that it postprocesses CFLAGS as needed for --enable-gcc-warnings.
+dnl except that it works around older pkg-config bugs and
+dnl it postprocesses CFLAGS as needed for --enable-gcc-warnings.
dnl EMACS_CHECK_MODULES accepts optional 3rd and 4th arguments that
dnl can take the place of the default HAVE_GSTUFF=yes and HAVE_GSTUFF=no
dnl actions.
AC_DEFUN([EMACS_CHECK_MODULES],
- [PKG_CHECK_MODULES([$1], [$2],
- [$1_CFLAGS=`AS_ECHO(["$$1_CFLAGS"]) | sed -e "$edit_cflags"`
- m4_default([$3], [HAVE_$1=yes])],
- [m4_default([$4], [HAVE_$1=no])])])
+ [dnl pkg-config before 0.26 doesn't check exit status properly; see:
+ dnl https://bugs.freedesktop.org/show_bug.cgi?id=29801
+ dnl Work around the bug by checking the status ourselves.
+ emacs_check_module_ok=false
+ AS_IF([test -n "$PKG_CONFIG" &&
+ { $PKG_CONFIG --atleast-pkgconfig-version 0.26 ||
+ { $PKG_CONFIG --cflags "$2" && $PKG_CONFIG --libs "$2"; }
+ } >/dev/null 2>&AS_MESSAGE_LOG_FD],
+ [PKG_CHECK_MODULES([$1], [$2],
+ [$1_CFLAGS=`AS_ECHO(["$$1_CFLAGS"]) | sed -e "$edit_cflags"`
+ emacs_check_module_ok=:],
+ [:])])
+ if $emacs_check_module_ok; then
+ m4_default([$3], [HAVE_$1=yes])
+ else
+ m4_default([$4], [HAVE_$1=no])
+ fi])
HAVE_SOUND=no
if test "${with_sound}" != "no"; then
HAVE_PNG=no
LIBPNG=
PNG_CFLAGS=
-if test "${with_png}" != no; then
+if test "${NS_IMPL_COCOA}" = yes; then
+ : # Nothing to do
+elif test "${with_png}" != no; then
# mingw32 loads the library dynamically.
if test "$opsys" = mingw32; then
AC_CHECK_HEADER([png.h], [HAVE_PNG=yes])
AC_SUBST(XINERAMA_CFLAGS)
AC_SUBST(XINERAMA_LIBS)
+### Use Xfixes (-lXfixes) if available
+HAVE_XFIXES=no
+if test "${HAVE_X11}" = "yes"; then
+ XFIXES_REQUIRED=4.0.0
+ XFIXES_MODULES="xfixes >= $XFIXES_REQUIRED"
+ EMACS_CHECK_MODULES([XFIXES], [$XFIXES_MODULES])
+ if test $HAVE_XFIXES = no; then
+ # Test old way in case pkg-config doesn't have it (older machines).
+ AC_CHECK_HEADER(X11/extensions/Xfixes.h,
+ [AC_CHECK_LIB(Xfixes, XFixesHideCursor, HAVE_XFIXES=yes)])
+ if test $HAVE_XFIXES = yes; then
+ XFIXES_LIBS=-lXfixes
+ fi
+ fi
+ if test $HAVE_XFIXES = yes; then
+ AC_DEFINE(HAVE_XFIXES, 1, [Define to 1 if you have the Xfixes extension.])
+ fi
+fi
+AC_SUBST(XFIXES_CFLAGS)
+AC_SUBST(XFIXES_LIBS)
### Use libxml (-lxml2) if available
### mingw32 doesn't use -lxml2, since it loads the library dynamically.
HCoop / bpt / emacs.git / blobdiff