code base: set the visilbity of internal library interfaces to hidden.

4 files changed, 34 insertions, 3 deletions

diff --git a/src/internal/tpax_dprintf_impl.c b/src/internal/tpax_dprintf_impl.c
index b8d2b0b..bb2a1d2 100644
--- a/src/internal/tpax_dprintf_impl.c
+++ b/src/internal/tpax_dprintf_impl.c
@@ -10,7 +10,9 @@
 #include <unistd.h>
 #include <errno.h>
 
-int tpax_dprintf(int fd, const char * fmt, ...)
+#include "tpax_visibility_impl.h"
+
+tpax_hidden int tpax_dprintf(int fd, const char * fmt, ...)
 {
 	int	ret;
 	int	cnt;
diff --git a/src/internal/tpax_errinfo_impl.c b/src/internal/tpax_errinfo_impl.c
index 5fd2247..0e68f51 100644
--- a/src/internal/tpax_errinfo_impl.c
+++ b/src/internal/tpax_errinfo_impl.c
@@ -7,8 +7,9 @@
 #include <tpax/tpax.h>
 #include "tpax_driver_impl.h"
 #include "tpax_errinfo_impl.h"
+#include "tpax_visibility_impl.h"
 
-int tpax_record_error(
+tpax_hidden int tpax_record_error(
 	const struct tpax_driver_ctx *	dctx,
 	int				esyscode,
 	int				elibcode,
diff --git a/src/internal/tpax_tmpfile_impl.c b/src/internal/tpax_tmpfile_impl.c
index 9dd9d40..dbc7765 100644
--- a/src/internal/tpax_tmpfile_impl.c
+++ b/src/internal/tpax_tmpfile_impl.c
@@ -14,6 +14,8 @@
 #include <stdio.h>
 #include <inttypes.h>
 
+#include "tpax_visibility_impl.h"
+
 #define PPRIX64 "%"PRIx64
 
 /* mkostemp might be guarded by non-standard macros */
@@ -55,7 +57,7 @@ static int tpax_mkostemp(char * tmplate)
 	return fd;
 }
 
-int tpax_tmpfile(void)
+tpax_hidden int tpax_tmpfile(void)
 {
 	int             fd;
 	void *          addr;
diff --git a/src/internal/tpax_visibility_impl.h b/src/internal/tpax_visibility_impl.h
new file mode 100644
index 0000000..6812494
--- /dev/null
+++ b/src/internal/tpax_visibility_impl.h
@@ -0,0 +1,26 @@
+#ifndef TPAX_VISIBILITY_IMPL_H
+#define TPAX_VISIBILITY_IMPL_H
+
+/**********************************************************************/
+/* PE targets: __dllexport suffices for the purpose of exporting only */
+/* the desired subset of global symbols; this makes the visibility    */
+/* attribute not only redundant, but also tricky if not properly      */
+/* supported by the toolchain.                                        */
+/*                                                                    */
+/* When targeting Midipix, __PE__, __dllexport and __dllimport are    */
+/* always defined by the toolchain. Otherwise, the absnece of these   */
+/* macros has been detected by sofort's ccenv.sh during ./configure,  */
+/* and they have accordingly been added to CFLAGS_OS.                 */
+/**********************************************************************/
+
+#ifdef __PE__
+#define tpax_hidden
+#else
+#ifdef _ATTR_VISIBILITY_HIDDEN
+#define tpax_hidden _ATTR_VISIBILITY_HIDDEN
+#else
+#define tpax_hidden
+#endif
+#endif
+
+#endif