# Allow configure to properly determine that libjpeg on Solaris is
# version 6b, and therefore usable. This patch comes from upstream:
# bug#20332: 24.5; With jpeg-6b configure says "WARNING: libjpeg found, bu
#
--- emacs-24.5.orig/configure.ac 2015-04-02 01:23:06.000000000 -0600
+++ emacs-24.5/configure.ac 2015-06-26 16:13:16.059095909 -0600
@@ -3066,48 +3066,40 @@
### mingw32 doesn't use -ljpeg, since it loads the library dynamically.
HAVE_JPEG=no
LIBJPEG=
-if test "${opsys}" = "mingw32"; then
- if test "${with_jpeg}" != "no"; then
- dnl Checking for jpeglib.h can lose because of a redefinition of
- dnl HAVE_STDLIB_H.
- AC_CHECK_HEADER(jerror.h, HAVE_JPEG=yes, HAVE_JPEG=no)
- fi
- AH_TEMPLATE(HAVE_JPEG, [Define to 1 if you have the jpeg library (-ljpeg).])dnl
- if test "${HAVE_JPEG}" = "yes"; then
- AC_DEFINE(HAVE_JPEG)
- AC_EGREP_CPP([version 6b or later],
- [#include <jpeglib.h>
- #if JPEG_LIB_VERSION >= 62
- version 6b or later
- #endif
- ],
- [AC_DEFINE(HAVE_JPEG)],
- [AC_MSG_WARN([libjpeg found, but not version 6b or later])
- HAVE_JPEG=no])
- fi
-elif test "${HAVE_X11}" = "yes" || test "${HAVE_W32}" = "yes"; then
- if test "${with_jpeg}" != "no"; then
- dnl Checking for jpeglib.h can lose because of a redefinition of
- dnl HAVE_STDLIB_H.
- AC_CHECK_HEADER(jerror.h,
- [AC_CHECK_LIB(jpeg, jpeg_destroy_compress, HAVE_JPEG=yes)])
- fi
-
- AH_TEMPLATE(HAVE_JPEG, [Define to 1 if you have the jpeg library (-ljpeg).])dnl
- if test "${HAVE_JPEG}" = "yes"; then
- AC_DEFINE(HAVE_JPEG)
- AC_EGREP_CPP([version 6b or later],
- [#include <jpeglib.h>
- #if JPEG_LIB_VERSION >= 62
- version 6b or later
- #endif
- ],
- [AC_DEFINE(HAVE_JPEG)],
- [AC_MSG_WARN([libjpeg found, but not version 6b or later])
- HAVE_JPEG=no])
- fi
- if test "${HAVE_JPEG}" = "yes"; then
- LIBJPEG=-ljpeg
+if test "${with_jpeg}" != "no"; then
+ AC_CACHE_CHECK([for jpeglib 6b or later],
+ [emacs_cv_jpeglib],
+ [OLD_LIBS=$LIBS
+ for emacs_cv_jpeglib in yes -ljpeg no; do
+ case $emacs_cv_jpeglib in
+ yes) ;;
+ no) break;;
+ *) LIBS="$LIBS $emacs_cv_jpeglib";;
+ esac
+ AC_LINK_IFELSE(
+ [AC_LANG_PROGRAM(
+ [[#undef HAVE_STDLIB_H /* Avoid config.h/jpeglib.h collision. */
+ #include <jpeglib.h>
+ #include <jerror.h>
+ char verify[JPEG_LIB_VERSION < 62 ? -1 : 1];
+ struct jpeg_decompress_struct cinfo;
+ ]],
+ [[
+ jpeg_create_decompress (&cinfo);
+ WARNMS (&cinfo, JWRN_JPEG_EOF);
+ jpeg_destroy_decompress (&cinfo);
+ ]])],
+ [emacs_link_ok=yes],
+ [emacs_link_ok=no])
+ LIBS=$OLD_LIBS
+ test $emacs_link_ok = yes && break
+ done])
+ if test "$emacs_cv_jpeglib" != no; then
+ HAVE_JPEG=yes
+ AC_DEFINE([HAVE_JPEG], 1,
+ [Define to 1 if you have the jpeg library (typically -ljpeg).])
+ test "$emacs_cv_jpeglib" != yes && LIBJPEG=$emacs_cv_jpeglib
fi
fi
AC_SUBST(LIBJPEG)