shithub: libdvdcss

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Support ELF visibility attribute

--- a/configure.ac

+++ b/configure.ac

@@ -185,6 +185,24 @@

 CFLAGS="${CFLAGS_save}"

 dnl

+dnl  Check if the compiler supports ELF visibility

+dnl

+CFLAGS_save="$CFLAGS"

+

+AC_CACHE_CHECK([if \$CC supports ELF visibility],

+    [ac_cv_c_visibility],

+    [CFLAGS="-fvisibility=hidden ${CFLAGS_save}"

+     AC_TRY_COMPILE([],

+                    [__attribute__((visibility("default"))) extern int visible],

+                    ac_cv_c_visibility=yes, ac_cv_c_visibility=no)])

+if test "${ac_cv_c_visibility}" != "no"; then

+    CFLAGS_save="-fvisibility=hidden ${CFLAGS_save}";

+    AC_DEFINE(HAVE_VISIBILITY, 1, Support ELF visibility.)

+fi

+

+CFLAGS="${CFLAGS_save}"

+

+dnl

 dnl  Use 64 bits offsets

 dnl

 CFLAGS="-D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64 -DDVDCSS_DIST ${CFLAGS}"

--- a/src/dvdcss/dvdcss.h

+++ b/src/dvdcss/dvdcss.h

@@ -60,6 +60,8 @@

 #define LIBDVDCSS_EXPORT __declspec(dllexport) extern

 #elif defined(LIBDVDCSS_IMPORTS)

 #define LIBDVDCSS_EXPORT __declspec(dllimport) extern

+#elif defined(HAVE_VISIBILITY)

+#define LIBDVDCSS_EXPORT __attribute__((visibility("default"))) extern

 #else

 #define LIBDVDCSS_EXPORT extern

 #endif