cppdefault.c (cpp_EXEC_PREFIX): New variable.

	* cppdefault.c (cpp_EXEC_PREFIX): New variable.
	* cppdefault.h (cpp_PREFIX): Document.
	(cpp_PREFIX_len): Likewise.
	(cpp_EXEC_PREFIX): New variable.
	* Makefile.in (PREPROCESSOR_DEFINES): Add STANDARD_EXEC_PREFIX.
	* c-incpath.c (add_standard_paths): Correct logic for relocating
	paths within prefix.

From-SVN: r122843

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 9113d5d..de0dd70 100644 (file)
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,13 @@
+2007-03-12  Mark Mitchell  <mark@codesourcery.com>
+
+       * cppdefault.c (cpp_EXEC_PREFIX): New variable.
+       * cppdefault.h (cpp_PREFIX): Document.
+       (cpp_PREFIX_len): Likewise.
+       (cpp_EXEC_PREFIX): New variable.
+       * Makefile.in (PREPROCESSOR_DEFINES): Add STANDARD_EXEC_PREFIX.
+       * c-incpath.c (add_standard_paths): Correct logic for relocating
+       paths within prefix.
+
 2007-03-12  Uros Bizjak  <ubizjak@gmail.com>
 
        * config/i386/i386.md (fixuns_trunc<mode>hi2): Implement from

diff --git a/gcc/Makefile.in b/gcc/Makefile.in
index a8792b8..6d3fe12 100644 (file)
--- a/gcc/Makefile.in
+++ b/gcc/Makefile.in
@@ -3210,6 +3210,7 @@ PREPROCESSOR_DEFINES = \
   -DCROSS_INCLUDE_DIR=\"$(CROSS_SYSTEM_HEADER_DIR)\" \
   -DTOOL_INCLUDE_DIR=\"$(gcc_tooldir)/include\" \
   -DPREFIX=\"$(prefix)\" \
+  -DSTANDARD_EXEC_PREFIX=\"$(libdir)/gcc\" \
   @TARGET_SYSTEM_ROOT_DEFINE@
 
 cppdefault.o: cppdefault.c $(CONFIG_H) $(SYSTEM_H) coretypes.h $(TM_H) \

diff --git a/gcc/c-incpath.c b/gcc/c-incpath.c
index fe863d5..3a9585b 100644 (file)
--- a/gcc/c-incpath.c
+++ b/gcc/c-incpath.c
@@ -167,11 +167,26 @@ add_standard_paths (const char *sysroot, const char *iprefix,
          else if (!p->add_sysroot && relocated
                   && strncmp (p->fname, cpp_PREFIX, cpp_PREFIX_len) == 0)
            {
-             /* If the compiler is relocated, and this is a configured 
-                prefix relative path, then we use gcc_exec_prefix instead 
-                of the configured prefix.  */
-             str = concat (gcc_exec_prefix, p->fname
-                             + cpp_PREFIX_len, NULL);
+             static const char *relocated_prefix;
+             /* If this path starts with the configure-time prefix, 
+                but the compiler has been relocated, replace it 
+                with the run-time prefix.  The run-time exec prefix
+                is GCC_EXEC_PREFIX.  Compute the path from there back
+                to the toplevel prefix.  */
+             if (!relocated_prefix)
+               {
+                 char *dummy;
+                 /* Make relative prefix expects the first argument
+                    to be a program, not a directory.  */
+                 dummy = concat (gcc_exec_prefix, "dummy", NULL);
+                 relocated_prefix 
+                   = make_relative_prefix (dummy,
+                                           cpp_EXEC_PREFIX,
+                                           cpp_PREFIX);
+               }
+             str = concat (relocated_prefix,
+                           p->fname + cpp_PREFIX_len, 
+                           NULL);
              str = update_path (str, p->component);
            }
          else

diff --git a/gcc/cppdefault.c b/gcc/cppdefault.c
index 597988e..3e60841 100644 (file)
--- a/gcc/cppdefault.c
+++ b/gcc/cppdefault.c
@@ -112,6 +112,7 @@ const size_t cpp_GCC_INCLUDE_DIR_len = 0;
 /* The configured prefix.  */
 const char cpp_PREFIX[] = PREFIX;
 const size_t cpp_PREFIX_len = sizeof PREFIX - 1;
+const char cpp_EXEC_PREFIX[] = STANDARD_EXEC_PREFIX;
 
 /* This value is set by cpp_relocated at runtime */
 const char *gcc_exec_prefix;

diff --git a/gcc/cppdefault.h b/gcc/cppdefault.h
index 2da6d05..398cc85 100644 (file)
--- a/gcc/cppdefault.h
+++ b/gcc/cppdefault.h
@@ -52,8 +52,16 @@ extern const struct default_include cpp_include_defaults[];
 extern const char cpp_GCC_INCLUDE_DIR[];
 extern const size_t cpp_GCC_INCLUDE_DIR_len;
 
+/* The configure-time prefix, i.e., the value supplied as the argument
+   to --prefix=.  */
 extern const char cpp_PREFIX[];
+/* The length of the configure-time prefix.  */
 extern const size_t cpp_PREFIX_len;
+/* The configure-time execution prefix.  This is typically the lib/gcc
+   subdirectory of cpp_PREFIX.  */
+extern const char cpp_EXEC_PREFIX[];
+/* The run-time execution prefix.  This is typically the lib/gcc
+   subdirectory of the actual installation.  */
 extern const char *gcc_exec_prefix;
 
 /* Return true if the toolchain is relocated.  */