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wrlib: Add support for v5 of the gif_lib API

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As reported by Nicolas (nhs), compilation of wrlib is broken when
switching to gif_lib v5.

The API of gif_lib has known little change to provide thread-safe usage,
so we now detect this in configure and and use the functions as appropriate
in gif.c

Signed-off-by: Christophe CURIS <christophe.curis@free.fr>
Signed-off-by: Carlos R. Mafra <crmafra@gmail.com>
This commit is contained in:
Christophe CURIS
2013-11-03 13:08:11 +01:00
committed by Carlos R. Mafra
parent 7831acebe3
commit a7663fbbcf
2 changed files with 27 additions and 4 deletions
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16
m4/wm_imgfmt_check.m4
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@@ -19,7 +19,7 @@
# WM_IMGFMT_CHECK_GIF
# -------------------
#
# Check for GIF file support through 'libgif' or 'libungif'
# Check for GIF file support through 'libgif', 'libungif' or 'giflib v5'
# The check depends on variable 'enable_gif' being either:
# yes - detect, fail if not found
# no - do not detect, disable support
@@ -53,7 +53,17 @@ AS_IF([test "x$enable_gif" = "xno"],
[AC_MSG_ERROR([found $wm_cv_imgfmt_gif but could not find appropriate header - are you missing libgif-dev package?])])
AS_IF([wm_fn_imgfmt_try_compile "gif_lib.h" "DGifOpenFileName(filename)" ""],
[wm_cv_imgfmt_gif="$wm_cv_imgfmt_gif version:4"],
[AC_MSG_ERROR([found $wm_cv_imgfmt_gif and header, but cannot compile - unsupported version?])])
[AC_COMPILE_IFELSE(
[AC_LANG_PROGRAM(
[@%:@include <gif_lib.h>
const char *filename = "dummy";],
[ int error_code;
DGifOpenFileName(filename, &error_code);] )],
[wm_cv_imgfmt_gif="$wm_cv_imgfmt_gif version:5"],
[AC_MSG_ERROR([found $wm_cv_imgfmt_gif and header, but cannot compile - unsupported version?])])dnl
]
)
CFLAGS="$wm_save_CFLAGS"])
])
AS_IF([test "x$wm_cv_imgfmt_gif" = "xno"],
@@ -62,7 +72,7 @@ AS_IF([test "x$enable_gif" = "xno"],
[supported_gfx="$supported_gfx GIF"
GFXLIBS="$GFXLIBS `echo "$wm_cv_imgfmt_gif" | sed -e 's, *version:.*,,' `"
AC_DEFINE_UNQUOTED([USE_GIF],
[1],
[`echo "$wm_cv_imgfmt_gif" | sed -e 's,.*version:,,' `],
[defined when valid GIF library with header was found])])
])
AM_CONDITIONAL([USE_GIF], [test "x$enable_gif" != "xno"])dnl