common-target-def.h, [...]: New files.

	* common/common-target-def.h, common/common-target.def,
	common/common-target.h, common/config/default-common.c,
	common/config/pa/pa-common.c: New files.
	* Makefile.in (common_out_file, common_out_object_file,
	COMMON_TARGET_H, COMMON_TARGET_DEF_H): New.
	(OBJS-libcommon-target): Include $(common_out_object_file).
	(prefix.o): Update dependencies.
	($(common_out_object_file), common/common-target-hooks-def.h,
	s-common-target-hooks-def-h): New.
	(s-tm-texi): Also check timestamp on common-target.def.
	(build/genhooks.o): Update dependencies.
	* config.gcc (common_out_file, target_has_targetm_common): Define.
	* config/pa/som.h (ALWAYS_STRIP_DOTDOT): Replace with
	TARGET_ALWAYS_STRIP_DOTDOT.
	* configure.ac (common_out_object_file): Define.
	(common_out_file, common_out_object_file): Substitute.
	(common): Create directory.
	* configure: Regenerate.
	* doc/tm.texi.in (targetm_common): Document.
	(TARGET_ALWAYS_STRIP_DOTDOT): Add @hook entry.
	* doc/tm.texi: Regenerate.
	* genhooks.c (hook_array): Also include common/common-target.def.
	* prefix.c (tm.h): Don't include.
	(common/common-target.h): Include.
	(ALWAYS_STRIP_DOTDOT): Don't define.
	(update_path): Use targetm_common.always_strip_dotdot instead of
	ALWAYS_STRIP_DOTDOT.
	* system.h (ALWAYS_STRIP_DOTDOT): Poison.

From-SVN: r175052

2 files changed, 26 insertions, 0 deletions

diff --git a/gcc/doc/tm.texi b/gcc/doc/tm.texi
index b32ff89..cda7f30 100644
--- a/gcc/doc/tm.texi
+++ b/gcc/doc/tm.texi
@@ -99,6 +99,16 @@ initializer @code{TARGETCM_INITIALIZER} in
 themselves, they should set @code{target_has_targetcm=yes} in
 @file{config.gcc}; otherwise a default definition is used.
 
+Similarly, there is a @code{targetm_common} variable for hooks that
+are shared between the compiler driver and the compilers proper,
+documented as ``Common Target Hook''.  This is declared in
+@file{common/common-target.h}, the initializer
+@code{TARGETM_COMMON_INITIALIZER} in
+@file{common/common-target-def.h}.  If targets initialize
+@code{targetm_common} themselves, they should set
+@code{target_has_targetm_common=yes} in @file{config.gcc}; otherwise a
+default definition is used.
+
 @node Driver
 @section Controlling the Compilation Driver, @file{gcc}
 @cindex driver
@@ -383,6 +393,10 @@ directories from linking commands.  Do not give it a nonzero value if
 removing duplicate search directories changes the linker's semantics.
 @end defmac
 
+@deftypevr {Common Target Hook} bool TARGET_ALWAYS_STRIP_DOTDOT
+True if @file{..} components should always be removed from directory names computed relative to GCC's internal directories, false (default) if such components should be preserved and directory names containing them passed to other tools such as the linker.
+@end deftypevr
+
 @defmac MULTILIB_DEFAULTS
 Define this macro as a C expression for the initializer of an array of
 string to tell the driver program which options are defaults for this
diff --git a/gcc/doc/tm.texi.in b/gcc/doc/tm.texi.in
index 667b1ef..3ea77c5 100644
--- a/gcc/doc/tm.texi.in
+++ b/gcc/doc/tm.texi.in
@@ -99,6 +99,16 @@ initializer @code{TARGETCM_INITIALIZER} in
 themselves, they should set @code{target_has_targetcm=yes} in
 @file{config.gcc}; otherwise a default definition is used.
 
+Similarly, there is a @code{targetm_common} variable for hooks that
+are shared between the compiler driver and the compilers proper,
+documented as ``Common Target Hook''.  This is declared in
+@file{common/common-target.h}, the initializer
+@code{TARGETM_COMMON_INITIALIZER} in
+@file{common/common-target-def.h}.  If targets initialize
+@code{targetm_common} themselves, they should set
+@code{target_has_targetm_common=yes} in @file{config.gcc}; otherwise a
+default definition is used.
+
 @node Driver
 @section Controlling the Compilation Driver, @file{gcc}
 @cindex driver
@@ -383,6 +393,8 @@ directories from linking commands.  Do not give it a nonzero value if
 removing duplicate search directories changes the linker's semantics.
 @end defmac
 
+@hook TARGET_ALWAYS_STRIP_DOTDOT
+
 @defmac MULTILIB_DEFAULTS
 Define this macro as a C expression for the initializer of an array of
 string to tell the driver program which options are defaults for this