Fix API visibility for libsquashfs.so

This commit adds a "predef.h" header to libsquashfs that exposes two
macros, SQFS_API and SQFS_INTERNAL that are used to explicilty set
the visibiliy of stuff that ends up in libsquashfs to default or
hidden.

For compatibillity with Windows which may at some point eventually be
considered, the SQFS_API define is set to dllexport IF the cpp symbol
SQFS_BUILDING_DLL is defined and set to import otherwise.

Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>

1 files changed, 4 insertions, 2 deletions

diff --git a/include/sqfs/inode.h b/include/sqfs/inode.h
index d693aec..37a088c 100644
--- a/include/sqfs/inode.h
+++ b/include/sqfs/inode.h
@@ -9,6 +9,7 @@
 
 #include "config.h"
 
+#include "sqfs/predef.h"
 #include "sqfs/meta_reader.h"
 #include "sqfs/meta_writer.h"
 
@@ -138,13 +139,14 @@ extern "C" {
 
 /* Inode can be freed with a single free() call.
    The function internally prints error message to stderr on failure. */
+SQFS_API
 sqfs_inode_generic_t *sqfs_meta_reader_read_inode(sqfs_meta_reader_t *ir,
 						  sqfs_super_t *super,
 						  uint64_t block_start,
 						  size_t offset);
 
-int sqfs_meta_writer_write_inode(sqfs_meta_writer_t *iw,
-				 sqfs_inode_generic_t *n);
+SQFS_API int sqfs_meta_writer_write_inode(sqfs_meta_writer_t *iw,
+					  sqfs_inode_generic_t *n);
 
 #ifdef __cplusplus
 }