| dnl Based on Xpdf configure.in and evince configure.ac |
| dnl Based on kde acinclude.m4.in, LGPL Licensed |
| |
| AC_DEFUN([AC_FIND_FILE], |
| [ |
| $3=NO |
| for i in $2; |
| do |
| for j in $1; |
| do |
| echo "configure: __oline__: $i/$j" >&AC_FD_CC |
| if test -r "$i/$j"; then |
| echo "taking that" >&AC_FD_CC |
| $3=$i |
| break 2 |
| fi |
| done |
| done |
| ]) |
| |
| AC_DEFUN([FIND_PNG_HELPER], |
| [ |
| AC_MSG_CHECKING([for libpng]) |
| AC_CACHE_VAL(ac_cv_lib_png, |
| [ |
| ac_save_LIBS="$LIBS" |
| LIBS="$all_libraries $USER_LDFLAGS -lpng -lm" |
| ac_save_CFLAGS="$CFLAGS" |
| CFLAGS="$CFLAGS $all_includes $USER_INCLUDES" |
| AC_TRY_LINK( |
| [ |
| #ifdef __cplusplus |
| extern "C" { |
| #endif |
| void png_access_version_number(); |
| #ifdef __cplusplus |
| } |
| #endif |
| ], |
| [png_access_version_number();], |
| eval "ac_cv_lib_png=-lpng", |
| eval "ac_cv_lib_png=no") |
| LIBS="$ac_save_LIBS" |
| CFLAGS="$ac_save_CFLAGS" |
| ]) |
| |
| if eval "test ! \"`echo $ac_cv_lib_png`\" = no"; then |
| enable_libpng=yes |
| LIBPNG_LIBS="$ac_cv_lib_png" |
| AC_MSG_RESULT($ac_cv_lib_png) |
| else |
| AC_MSG_RESULT(no) |
| $1 |
| fi |
| ]) |
| |
| |
| AC_DEFUN([POPPLER_FIND_PNG], |
| [ |
| dnl first look for libraries |
| FIND_PNG_HELPER( |
| FIND_PNG_HELPER(normal, [], |
| [ |
| LIBPNG_LIBS= |
| ] |
| ) |
| ) |
| |
| dnl then search the headers (can't use simply AC_TRY_xxx, as png.h |
| dnl requires system dependent includes loaded before it) |
| png_incdirs="`eval echo $includedir` /usr/include /usr/local/include " |
| AC_FIND_FILE(png.h, $png_incdirs, png_incdir) |
| test "x$png_incdir" = xNO && png_incdir= |
| |
| dnl if headers _and_ libraries are missing, this is no error, and we |
| dnl continue with a warning (the user will get no png support) |
| dnl if only one is missing, it means a configuration error, but we still |
| dnl only warn |
| if test -n "$png_incdir" && test -n "$LIBPNG_LIBS" ; then |
| AC_DEFINE_UNQUOTED(ENABLE_LIBPNG, 1, [Define if you have libpng]) |
| else |
| if test -n "$png_incdir" || test -n "$LIBPNG_LIBS" ; then |
| AC_MSG_WARN([ |
| There is an installation error in png support. You seem to have only one of |
| either the headers _or_ the libraries installed. You may need to either provide |
| correct --with-extra-... options, or the development package of libpng. You |
| can get a source package of libpng from http://www.libpng.org/pub/png/libpng.html |
| Disabling PNG support. |
| ]) |
| else |
| AC_MSG_WARN([libpng not found. disable PNG support.]) |
| fi |
| png_incdir= |
| enable_libpng=no |
| LIBPNG_LIBS= |
| fi |
| |
| AC_SUBST(LIBPNG_LIBS) |
| ]) |