* gthr-gnat.c, gthr-gnat.h, gthr.h, libgcc2.h, unwind-dw2-fde.h

	* unwind.h: Surround all visibility pragmas with #ifndef HIDE_EXPORTS.

	* mklibgcc.in: Drastic restructure for comprehensibility.
	Remove the old hidden-directive hack.
	Eliminate support for .txt files in LIB2ADD etc (never used).
	Eliminate support for assembly source files in LIB2ADDEH* and
	LIBUNWIND (also never used).
	Build up dependency lists for libraries incrementally.
	If we have SHLIB_LINK, compile each file twice, once for the
	static and once for the shared library; also probe for
	-fvisibility=hidden in the generated libgcc.mk.  If found,
	pass that and -DHIDE_EXPORTS to the compilation of every C
	source file going into the static library.  If found, generate
	hidden-directive lists for every assembly source file going
	into the static library, but incorporate them with -include
	instead of ld -r.
	Write comments into generated libgcc.mk to facilitate debugging.
	* Makefile.in: Pass ASM_HIDDEN_OP to mklibgcc.
	* config/t-slibgcc-darwin: Define ASM_HIDDEN_OP.

	* config/darwin.h (REAL_LIBGCC_SPEC): Put -lgcc back in
	-Zdynamiclib case.

From-SVN: r91513

gcc/ChangeLog

+2004-11-30  Zack Weinberg  <zack@codesourcery.com>
+
+	* gthr-gnat.c, gthr-gnat.h, gthr.h, libgcc2.h, unwind-dw2-fde.h
+	* unwind.h: Surround all visibility pragmas with #ifndef HIDE_EXPORTS.
+
+	* mklibgcc.in: Drastic restructure for comprehensibility.
+	Remove the old hidden-directive hack.
+	Eliminate support for .txt files in LIB2ADD etc (never used).
+	Eliminate support for assembly source files in LIB2ADDEH* and
+	LIBUNWIND (also never used).
+	Build up dependency lists for libraries incrementally.
+	If we have SHLIB_LINK, compile each file twice, once for the
+	static and once for the shared library; also probe for
+	-fvisibility=hidden in the generated libgcc.mk.  If found,
+	pass that and -DHIDE_EXPORTS to the compilation of every C
+	source file going into the static library.  If found, generate
+	hidden-directive lists for every assembly source file going
+	into the static library, but incorporate them with -include
+	instead of ld -r.
+	Write comments into generated libgcc.mk to facilitate debugging.
+	* Makefile.in: Pass ASM_HIDDEN_OP to mklibgcc.
+	* config/t-slibgcc-darwin: Define ASM_HIDDEN_OP.
+
+	* config/darwin.h (REAL_LIBGCC_SPEC): Put -lgcc back in
+	-Zdynamiclib case.
+
 2004-11-29  Richard Henderson  <rth@redhat.com>
 
 	* expr.c (get_inner_reference): Handle REAL/IMAGPART_EXPR.

gcc/Makefile.in

@@ -1235,6 +1235,7 @@ libgcc.mk: config.status Makefile mklibgcc $(LIB2ADD) $(LIB2ADD_ST) xgcc$(exeext
 	SHLIB_MAPFILES='$(SHLIB_MAPFILES)' \
 	SHLIB_NM_FLAGS='$(SHLIB_NM_FLAGS)' \
 	MULTILIB_OSDIRNAMES='$(MULTILIB_OSDIRNAMES)' \
+	ASM_HIDDEN_OP='$(ASM_HIDDEN_OP)' \
 	mkinstalldirs='$(mkinstalldirs)' \
 	  $(SHELL) mklibgcc > tmp-libgcc.mk
 	mv tmp-libgcc.mk libgcc.mk

gcc/config/darwin.h

@@ -317,7 +317,7 @@ extern const char *darwin_fix_and_continue_switch;
    "%{static|static-libgcc:-lgcc -lgcc_eh}\
     %{!static:%{!static-libgcc:\
       %{!Zdynamiclib:%{!shared-libgcc:-lgcc -lgcc_eh}\
-      %{shared-libgcc:-lgcc_s -lgcc} } %{Zdynamiclib:-lgcc_s}}}"
+      %{shared-libgcc:-lgcc_s -lgcc}} %{Zdynamiclib:-lgcc_s -lgcc}}}"
 
 /* We specify crt0.o as -lcrt0.o so that ld will search the library path.  */
 

gcc/config/t-slibgcc-darwin

@@ -34,3 +34,6 @@ SHLIB_INSTALL = \
 SHLIB_MKMAP = $(srcdir)/mkmap-flat.awk
 SHLIB_MKMAP_OPTS = -v leading_underscore=1
 SHLIB_MAPFILES = $(srcdir)/libgcc-std.ver
+
+# Must use a different directive for hidden visibility in assembly sources.
+ASM_HIDDEN_OP = .private_extern

gcc/gthr-gnat.c

@@ -28,7 +28,9 @@ Software Foundation, 59 Temple Place - Suite 330, Boston, MA
 
 #include "gthr-gnat.h"
 
+#ifndef HIDE_EXPORTS
 #pragma GCC visibility push(default)
+#endif
 
 #ifdef __cplusplus
 #define UNUSED(x)
@@ -81,4 +83,6 @@ __gthread_mutex_unlock (__gthread_mutex_t * UNUSED (mutex))
   return 0;
 }
 
+#ifndef HIDE_EXPORTS
 #pragma GCC visibility pop
+#endif

gcc/gthr-gnat.h

@@ -28,7 +28,9 @@ Software Foundation, 59 Temple Place - Suite 330, Boston, MA
 #ifndef GCC_GTHR_GNAT_H
 #define GCC_GTHR_GNAT_H
 
+#ifndef HIDE_EXPORTS
 #pragma GCC visibility push(default)
+#endif
 
 /* Just provide compatibility for mutex handling.  */
 
@@ -41,7 +43,9 @@ extern int __gthread_active_p (void);
 extern int __gthread_mutex_lock (__gthread_mutex_t *);
 extern int __gthread_mutex_unlock (__gthread_mutex_t *);
 
+#ifndef HIDE_EXPORTS
 #pragma GCC visibility pop
+#endif
 
 #endif /* ! GCC_GTHR_GNAT_H */
 

gcc/gthr.h

@@ -29,7 +29,9 @@ Software Foundation, 59 Temple Place - Suite 330, Boston, MA
 #ifndef GCC_GTHR_H
 #define GCC_GTHR_H
 
+#ifndef HIDE_EXPORTS
 #pragma GCC visibility push(default)
+#endif
 
 /* If this file is compiled with threads support, it must
        #define __GTHREADS 1
@@ -116,6 +118,8 @@ Software Foundation, 59 Temple Place - Suite 330, Boston, MA
 #include "gthr-single.h"
 #endif
 
+#ifndef HIDE_EXPORTS
 #pragma GCC visibility pop
+#endif
 
 #endif /* ! GCC_GTHR_H */

gcc/libgcc2.h

@@ -30,7 +30,9 @@ Software Foundation, 59 Temple Place - Suite 330, Boston, MA
 #ifndef GCC_LIBGCC2_H
 #define GCC_LIBGCC2_H
 
+#ifndef HIDE_EXPORTS
 #pragma GCC visibility push(default)
+#endif
 
 extern int __gcc_bcmp (const unsigned char *, const unsigned char *, size_t);
 extern void __clear_cache (char *, char *);
@@ -324,6 +326,8 @@ extern int __parityDI2 (UDWtype);
 
 extern void __enable_execute_stack (void *);
 
+#ifndef HIDE_EXPORTS
 #pragma GCC visibility pop
+#endif
 
 #endif /* ! GCC_LIBGCC2_H */

gcc/unwind-dw2-fde.h

@@ -32,7 +32,9 @@ Software Foundation, 59 Temple Place - Suite 330, Boston, MA
 #ifndef GCC_UNWIND_DW2_FDE_H
 #define GCC_UNWIND_DW2_FDE_H
 
+#ifndef HIDE_EXPORTS
 #pragma GCC visibility push(default)
+#endif
 
 struct fde_vector
 {
@@ -179,6 +181,8 @@ last_fde (struct object *obj __attribute__ ((__unused__)), const fde *f)
 #endif
 }
 
+#ifndef HIDE_EXPORTS
 #pragma GCC visibility pop
+#endif
 
 #endif /* unwind-dw2-fde.h */

gcc/unwind.h

@@ -31,7 +31,9 @@
 #ifndef _UNWIND_H
 #define _UNWIND_H
 
+#ifndef HIDE_EXPORTS
 #pragma GCC visibility push(default)
+#endif
 
 #ifdef __cplusplus
 extern "C" {
@@ -231,6 +233,8 @@ extern void * _Unwind_FindEnclosingFunction (void *pc);
 }
 #endif
 
+#ifndef HIDE_EXPORTS
 #pragma GCC visibility pop
+#endif
 
 #endif /* unwind.h */