<URL: http://bugs.freeciv.org/Ticket/Display.html?id=40242 >
2008/5/13 Marko Lindqvist:
>
> Checks for libpng are not working too well with some modern environments
>
> Attached patch improves situation:
> 1) Using pkg-config to detect libpng
> 2) If (1) fails, use old method, but prefer libpng12 over obsoleted name
> libpng
> 3) Avoid adding unnecessary (duplicate) flags to LDFLAGS
This version contains only the essential part of the patch - changes
to configure.ac are not really related and the version sent earlier
even broke some compilations.
- ML
diff -Nurd -X.diff_ignore freeciv/m4/win32-client.m4 freeciv/m4/win32-client.m4
--- freeciv/m4/win32-client.m4 2007-03-05 19:13:41.000000000 +0200
+++ freeciv/m4/win32-client.m4 2008-05-15 01:10:11.000000000 +0300
@@ -7,33 +7,42 @@
[
if test "$client" = "win32" || test "$client" = "yes" ; then
if test "$MINGW32" = "yes"; then
- AC_CHECK_LIB([z], [gzgets],
+ PKG_CHECK_MODULES([PNG], [libpng],
+ [
+ CLIENT_LIBS="-lwsock32 -lcomctl32 -mwindows $PNG_LIBS"
+ CLIENT_CFLAGS="$PNG_CFLAGS"
+ ],
+ [
+ AC_CHECK_LIB([z], [gzgets],
[
AC_CHECK_HEADER([zlib.h],
+ [
+ AC_CHECK_LIB([png12], [png_read_image],,
[
- AC_CHECK_LIB([png], [png_read_image],
- [
- AC_CHECK_HEADER([png.h],
- [
- found_client=yes
- client=win32
- CLIENT_LIBS="-lwsock32 -lcomctl32 -lpng -lz -mwindows"
- ],
- [
- FC_NO_CLIENT([win32], [libpng-dev is needed])
- ])
- ],
- [
- FC_NO_CLIENT([win32], [libpng is needed])
- ], [-lz])
+ AC_CHECK_LIB([png], [png_read_image],,
+ [
+ FC_NO_CLIENT([win32], [libpng is needed])
+ ])
+ ])
+
+ AC_CHECK_HEADER([png.h],
+ [
+ found_client=yes
+ client=win32
+ CLIENT_LIBS="-lwsock32 -lcomctl32 -lpng -mwindows"
],
[
- FC_NO_CLIENT([win32], [zlib-dev is needed])
+ FC_NO_CLIENT([win32], [libpng-dev is needed])
])
+ ],
+ [
+ FC_NO_CLIENT([win32], [zlib-dev is needed])
+ ])
],
[
FC_NO_CLIENT([win32], [zlib is needed])
])
+ ])
else
FC_NO_CLIENT([win32], [mingw32 is needed])
fi
diff -Nurd -X.diff_ignore freeciv/m4/xaw-client.m4 freeciv/m4/xaw-client.m4
--- freeciv/m4/xaw-client.m4 2007-03-05 19:13:41.000000000 +0200
+++ freeciv/m4/xaw-client.m4 2008-05-15 01:10:11.000000000 +0300
@@ -22,11 +22,25 @@
fi
dnl Check for libpng
- AC_CHECK_LIB(png, png_read_image, [X_LIBS="$X_LIBS -lpng -lm"],
- AC_MSG_ERROR([Could not find PNG library (libpng).]), [-lm -lz])
- AC_CHECK_HEADER(png.h, ,
+ PKG_CHECK_MODULES([PNG], [libpng],
+ [
+ X_LIBS="$X_LIBS $PNG_LIBS"
+ X_CFLAGS="$X_CFLAGS $PNG_CFLAGS"
+ ],
+ [
+ AC_CHECK_LIB([png12], [png_read_image], [X_LIBS="$X_LIBS -lpng12 -lm"],
+ [
+ AC_CHECK_LIB([png], [png_read_image], [X_LIBS="$X_LIBS -lpng -lm"],
+ [
+ AC_MSG_ERROR([Could not find PNG library.])
+ ])
+ ])
+ AC_CHECK_HEADER([png.h],,
+ [
AC_MSG_ERROR([libpng found but not png.h.
-You may need to install a libpng \"development\" package.]))
+You may need to install a libpng \"development\" package.])
+ ])
+ ])
dnl Try to get additional Xpm paths:
FC_XPM_PATHS
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