X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?a=blobdiff_plain;f=src%2Freadahead%2Fsd-readahead.c;h=a3340666dd7326f3bcd8e0f713c563867c474d7d;hb=4cfa2c999dea269ddc646bfeba6c7f1021a73843;hp=c5cfe6710732c900a459510fd937aefca26ec44e;hpb=e5e83e8362e946890ac991fc86a2c5869f9befdf;p=elogind.git

diff --git a/src/readahead/sd-readahead.c b/src/readahead/sd-readahead.c
index c5cfe6710..a3340666d 100644
--- a/src/readahead/sd-readahead.c
+++ b/src/readahead/sd-readahead.c
@@ -37,6 +37,18 @@
 
 #include "sd-readahead.h"
 
+#if (__GNUC__ >= 4)
+#ifdef SD_EXPORT_SYMBOLS
+/* Export symbols */
+#define _sd_export_ __attribute__ ((visibility("default")))
+#else
+/* Don't export the symbols */
+#define _sd_export_ __attribute__ ((visibility("hidden")))
+#endif
+#else
+#define _sd_export_
+#endif
+
 static int touch(const char *path) {
 
 #if !defined(DISABLE_SYSTEMD) && defined(__linux__)
@@ -60,7 +72,7 @@ static int touch(const char *path) {
         return 0;
 }
 
-int sd_readahead(const char *action) {
+_sd_export_ int sd_readahead(const char *action) {
 
         if (!action)
                 return -EINVAL;