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[2/8] Handle sysroots on AIX (needs build-system maintainer)

From: Richard Sandiford <richards at transitive dot com>
To: gcc-patches at gcc dot gnu dot org
Date: Tue, 02 Jun 2009 13:10:14 +0100
Subject: [2/8] Handle sysroots on AIX (needs build-system maintainer)
References: <g44ouyhmgm.fsf@richards-desktop.transitives.com>
[Build or global write maintainer needed for point (2) below.]

This patch adds --sysroot support to the AIX configurations.  There are
three changes:

  (1) Add %R to absolute spec filenames (pretty trivial).

  (2) Make TARGET_SYSTEM_ROOT available to the libgcc makefiles
      (needed by (3)).

  (3) Add $(TARGET_SYSTEM_ROOT) to absolute filenames in the t-aix*
      libgcc fragments.

We used to assume that the syscall lists aren't available for cross builds:

    #ifndef CROSS_DIRECTORY_STRUCTURE
    #define LINK_LIBG_SPEC "-bexport:/usr/lib/libg.exp"
    #else
    #define LINK_LIBG_SPEC ""
    #endif

But you can't really build anything useful without access to the core
libraries and syscall lists, so I think we should just drop this
behaviour and require --sysroot instead.  I've therefore used the
!CROSS_DIRECTORY_STRUCTURE for cross builds too and applied (1) to it.

Tested on powerpc-ibm-aix6.1 and x86_64-linux-gnu.  OK to install?

Richard


gcc/
	* Makefile.in (libgcc.mvars): Add TARGET_SYSTEM_ROOT.
	* config/rs6000/aix.h (LINK_SYSCALLS_SPEC): Add %R to the
	!CROSS_DIRECTORY_STRUCTURE alternative and use it for
	CROSS_DIRECTORY_STRUCTURE too.
	(LINK_LIBG_SPEC): Likewise.
	(LIB_SPEC): Add %R to sysroot paths.
	* config/rs6000/aix43.h (CPP_SPEC): Add %R to sysroot paths.
	(CPLUSPLUS_CPP_SPEC, LIB_SPEC): Likewise.
	* config/rs6000/aix51.h: As for aix43.h.
	* config/rs6000/aix52.h: Likewise.
	* config/rs6000/aix53.h: Likewise.
	* config/rs6000/aix61.h: Likewise.
	* config/rs6000/t-aix52 (SHLIB_LINK): Add $(TARGET_SYSTEM_ROOT)
	to the beginning of sysroot paths.

Index: gcc/Makefile.in
===================================================================
--- gcc/Makefile.in	2009-06-02 13:05:47.000000000 +0100
+++ gcc/Makefile.in	2009-06-02 13:06:03.000000000 +0100
@@ -1753,6 +1753,7 @@ libgcc.mvars: config.status Makefile $(L
 	echo CRTSTUFF_CFLAGS = '$(CRTSTUFF_CFLAGS)' >> tmp-libgcc.mvars
 	echo CRTSTUFF_T_CFLAGS = '$(CRTSTUFF_T_CFLAGS)' >> tmp-libgcc.mvars
 	echo CRTSTUFF_T_CFLAGS_S = '$(CRTSTUFF_T_CFLAGS_S)' >> tmp-libgcc.mvars
+	echo TARGET_SYSTEM_ROOT = '$(TARGET_SYSTEM_ROOT)' >> tmp-libgcc.mvars
 
 	mv tmp-libgcc.mvars libgcc.mvars
 
Index: gcc/config/rs6000/aix.h
===================================================================
--- gcc/config/rs6000/aix.h	2009-06-02 13:05:47.000000000 +0100
+++ gcc/config/rs6000/aix.h	2009-06-02 13:06:03.000000000 +0100
@@ -120,18 +120,10 @@ #define ASM_DEFAULT_SPEC ""
 /* #define ASM_SPEC "-u %(asm_cpu)" */
 
 /* Default location of syscalls.exp under AIX */
-#ifndef CROSS_DIRECTORY_STRUCTURE
-#define LINK_SYSCALLS_SPEC "-bI:/lib/syscalls.exp"
-#else
-#define LINK_SYSCALLS_SPEC ""
-#endif
+#define LINK_SYSCALLS_SPEC "-bI:%R/lib/syscalls.exp"
 
 /* Default location of libg.exp under AIX */
-#ifndef CROSS_DIRECTORY_STRUCTURE
-#define LINK_LIBG_SPEC "-bexport:/usr/lib/libg.exp"
-#else
-#define LINK_LIBG_SPEC ""
-#endif
+#define LINK_LIBG_SPEC "-bexport:%R/usr/lib/libg.exp"
 
 /* Define the options for the binder: Start text at 512, align all segments
    to 512 bytes, and warn if there is text relocation.
@@ -152,8 +144,8 @@ #define LINK_SPEC "-T512 -H512 %{!r:-bte
 %{!shared:%{g*: %(link_libg) }} %{shared:-bM:SRE}"
 
 /* Profiled library versions are used by linking with special directories.  */
-#define LIB_SPEC "%{pg:-L/lib/profiled -L/usr/lib/profiled}\
-%{p:-L/lib/profiled -L/usr/lib/profiled} %{!shared:%{g*:-lg}} -lc"
+#define LIB_SPEC "%{pg:-L%R/lib/profiled -L%R/usr/lib/profiled}\
+%{p:-L%R/lib/profiled -L%R/usr/lib/profiled} %{!shared:%{g*:-lg}} -lc"
 
 /* Static linking with shared libstdc++ requires libsupc++ as well.  */
 #define LIBSTDCXX_STATIC "-lstdc++ -lsupc++"
Index: gcc/config/rs6000/aix43.h
===================================================================
--- gcc/config/rs6000/aix43.h	2009-06-02 13:05:47.000000000 +0100
+++ gcc/config/rs6000/aix43.h	2009-06-02 13:06:03.000000000 +0100
@@ -104,7 +104,7 @@ #define TARGET_OS_CPP_BUILTINS()     \
 #define CPP_SPEC "%{posix: -D_POSIX_SOURCE}\
    %{ansi: -D_ANSI_C_SOURCE}\
    %{maix64: -D__64BIT__}\
-   %{mpe: -I/usr/lpp/ppe.poe/include}\
+   %{mpe: -I%R/usr/lpp/ppe.poe/include}\
    %{pthread: -D_THREAD_SAFE}"
 
 /* The GNU C++ standard library requires that these macros be 
@@ -113,7 +113,7 @@ #define CPP_SPEC "%{posix: -D_POSIX_SOUR
 #define CPLUSPLUS_CPP_SPEC			\
   "-D_ALL_SOURCE				\
    %{maix64: -D__64BIT__}			\
-   %{mpe: -I/usr/lpp/ppe.poe/include}		\
+   %{mpe: -I%R/usr/lpp/ppe.poe/include}		\
    %{pthread: -D_THREAD_SAFE}"
 
 #undef TARGET_DEFAULT
@@ -141,11 +141,11 @@ #define TARGET_ALTIVEC_ABI 0
 #define	MULTILIB_DEFAULTS { "mcpu=common" }
 
 #undef LIB_SPEC
-#define LIB_SPEC "%{pg:-L/lib/profiled -L/usr/lib/profiled}\
-   %{p:-L/lib/profiled -L/usr/lib/profiled}\
+#define LIB_SPEC "%{pg:-L%R/lib/profiled -L%R/usr/lib/profiled}\
+   %{p:-L%R/lib/profiled -L%R/usr/lib/profiled}\
    %{!maix64:%{!shared:%{g*:-lg}}}\
-   %{mpe:-L/usr/lpp/ppe.poe/lib -lmpi -lvtd}\
-   %{pthread:-L/usr/lib/threads -lpthreads -lc_r /usr/lib/libc.a}\
+   %{mpe:-L%R/usr/lpp/ppe.poe/lib -lmpi -lvtd}\
+   %{pthread:-L%R/usr/lib/threads -lpthreads -lc_r %R/usr/lib/libc.a}\
    %{!pthread:-lc}"
 
 #undef LINK_SPEC
Index: gcc/config/rs6000/aix51.h
===================================================================
--- gcc/config/rs6000/aix51.h	2009-06-02 13:05:47.000000000 +0100
+++ gcc/config/rs6000/aix51.h	2009-06-02 13:06:03.000000000 +0100
@@ -101,7 +101,7 @@ #define TARGET_OS_CPP_BUILTINS()     \
 #define CPP_SPEC "%{posix: -D_POSIX_SOURCE}	\
   %{ansi: -D_ANSI_C_SOURCE}			\
   %{maix64: -D__64BIT__}			\
-  %{mpe: -I/usr/lpp/ppe.poe/include}		\
+  %{mpe: -I%R/usr/lpp/ppe.poe/include}		\
   %{pthread: -D_THREAD_SAFE}"
 
 /* The GNU C++ standard library requires that these macros be 
@@ -110,7 +110,7 @@ #define CPP_SPEC "%{posix: -D_POSIX_SOUR
 #define CPLUSPLUS_CPP_SPEC			\
   "-D_ALL_SOURCE				\
    %{maix64: -D__64BIT__}			\
-   %{mpe: -I/usr/lpp/ppe.poe/include}		\
+   %{mpe: -I%R/usr/lpp/ppe.poe/include}		\
    %{pthread: -D_THREAD_SAFE}"
 
 #undef TARGET_DEFAULT
@@ -138,10 +138,10 @@ #define TARGET_ALTIVEC_ABI 0
 #define	MULTILIB_DEFAULTS { "mcpu=common" }
 
 #undef LIB_SPEC
-#define LIB_SPEC "%{pg:-L/lib/profiled -L/usr/lib/profiled}\
-   %{p:-L/lib/profiled -L/usr/lib/profiled}\
+#define LIB_SPEC "%{pg:-L%R/lib/profiled -L%R/usr/lib/profiled}\
+   %{p:-L%R/lib/profiled -L%R/usr/lib/profiled}\
    %{!maix64:%{!shared:%{g*:-lg}}}\
-   %{mpe:-L/usr/lpp/ppe.poe/lib -lmpi -lvtd}\
+   %{mpe:-L%R/usr/lpp/ppe.poe/lib -lmpi -lvtd}\
    %{pthread:-lpthreads} -lc"
 
 #undef LINK_SPEC
Index: gcc/config/rs6000/aix52.h
===================================================================
--- gcc/config/rs6000/aix52.h	2009-06-02 13:05:47.000000000 +0100
+++ gcc/config/rs6000/aix52.h	2009-06-02 13:06:03.000000000 +0100
@@ -99,7 +99,7 @@ #define TARGET_OS_CPP_BUILTINS()     \
 #define CPP_SPEC "%{posix: -D_POSIX_SOURCE}	\
   %{ansi: -D_ANSI_C_SOURCE}			\
   %{maix64: -D__64BIT__}			\
-  %{mpe: -I/usr/lpp/ppe.poe/include}		\
+  %{mpe: -I%R/usr/lpp/ppe.poe/include}		\
   %{pthread: -D_THREAD_SAFE}"
 
 /* The GNU C++ standard library requires that these macros be 
@@ -108,7 +108,7 @@ #define CPP_SPEC "%{posix: -D_POSIX_SOUR
 #define CPLUSPLUS_CPP_SPEC			\
   "-D_ALL_SOURCE				\
    %{maix64: -D__64BIT__}			\
-   %{mpe: -I/usr/lpp/ppe.poe/include}		\
+   %{mpe: -I%R/usr/lpp/ppe.poe/include}		\
    %{pthread: -D_THREAD_SAFE}"
 
 #undef  TARGET_DEFAULT
@@ -140,10 +140,10 @@ #define TARGET_ALTIVEC_ABI 0
 #undef	MULTILIB_DEFAULTS
 
 #undef LIB_SPEC
-#define LIB_SPEC "%{pg:-L/lib/profiled -L/usr/lib/profiled}\
-   %{p:-L/lib/profiled -L/usr/lib/profiled}\
+#define LIB_SPEC "%{pg:-L%R/lib/profiled -L%R/usr/lib/profiled}\
+   %{p:-L%R/lib/profiled -L%R/usr/lib/profiled}\
    %{!maix64:%{!shared:%{g*:-lg}}}\
-   %{mpe:-L/usr/lpp/ppe.poe/lib -lmpi -lvtd}\
+   %{mpe:-L%R/usr/lpp/ppe.poe/lib -lmpi -lvtd}\
    %{pthread:-lpthreads} -lc"
 
 #undef LINK_SPEC
Index: gcc/config/rs6000/aix53.h
===================================================================
--- gcc/config/rs6000/aix53.h	2009-06-02 13:05:47.000000000 +0100
+++ gcc/config/rs6000/aix53.h	2009-06-02 13:06:03.000000000 +0100
@@ -101,7 +101,7 @@ #define TARGET_OS_CPP_BUILTINS()     \
 #define CPP_SPEC "%{posix: -D_POSIX_SOURCE}	\
   %{ansi: -D_ANSI_C_SOURCE}			\
   %{maix64: -D__64BIT__}			\
-  %{mpe: -I/usr/lpp/ppe.poe/include}		\
+  %{mpe: -I%R/usr/lpp/ppe.poe/include}		\
   %{pthread: -D_THREAD_SAFE}"
 
 /* The GNU C++ standard library requires that these macros be 
@@ -110,7 +110,7 @@ #define CPP_SPEC "%{posix: -D_POSIX_SOUR
 #define CPLUSPLUS_CPP_SPEC			\
   "-D_ALL_SOURCE				\
    %{maix64: -D__64BIT__}			\
-   %{mpe: -I/usr/lpp/ppe.poe/include}		\
+   %{mpe: -I%R/usr/lpp/ppe.poe/include}		\
    %{pthread: -D_THREAD_SAFE}"
 
 #undef  TARGET_DEFAULT
@@ -136,10 +136,10 @@ #define TARGET_POWER 0
 #undef	MULTILIB_DEFAULTS
 
 #undef LIB_SPEC
-#define LIB_SPEC "%{pg:-L/lib/profiled -L/usr/lib/profiled}\
-   %{p:-L/lib/profiled -L/usr/lib/profiled}\
+#define LIB_SPEC "%{pg:-L%R/lib/profiled -L%R/usr/lib/profiled}\
+   %{p:-L%R/lib/profiled -L%R/usr/lib/profiled}\
    %{!maix64:%{!shared:%{g*:-lg}}}\
-   %{mpe:-L/usr/lpp/ppe.poe/lib -lmpi -lvtd}\
+   %{mpe:-L%R/usr/lpp/ppe.poe/lib -lmpi -lvtd}\
    %{pthread:-lpthreads} -lc"
 
 #undef LINK_SPEC
Index: gcc/config/rs6000/aix61.h
===================================================================
--- gcc/config/rs6000/aix61.h	2009-06-02 13:05:47.000000000 +0100
+++ gcc/config/rs6000/aix61.h	2009-06-02 13:06:03.000000000 +0100
@@ -102,7 +102,7 @@ #define TARGET_OS_CPP_BUILTINS()     \
 #define CPP_SPEC "%{posix: -D_POSIX_SOURCE}	\
   %{ansi: -D_ANSI_C_SOURCE}			\
   %{maix64: -D__64BIT__}			\
-  %{mpe: -I/usr/lpp/ppe.poe/include}		\
+  %{mpe: -I%R/usr/lpp/ppe.poe/include}		\
   %{pthread: -D_THREAD_SAFE}"
 
 /* The GNU C++ standard library requires that these macros be 
@@ -111,7 +111,7 @@ #define CPP_SPEC "%{posix: -D_POSIX_SOUR
 #define CPLUSPLUS_CPP_SPEC			\
   "-D_ALL_SOURCE -D__COMPATMATH__		\
    %{maix64: -D__64BIT__}			\
-   %{mpe: -I/usr/lpp/ppe.poe/include}		\
+   %{mpe: -I%R/usr/lpp/ppe.poe/include}		\
    %{pthread: -D_THREAD_SAFE}"
 
 #undef  TARGET_DEFAULT
@@ -137,10 +137,10 @@ #define TARGET_POWER 0
 #undef	MULTILIB_DEFAULTS
 
 #undef LIB_SPEC
-#define LIB_SPEC "%{pg:-L/lib/profiled -L/usr/lib/profiled}\
-   %{p:-L/lib/profiled -L/usr/lib/profiled}\
+#define LIB_SPEC "%{pg:-L%R/lib/profiled -L%R/usr/lib/profiled}\
+   %{p:-L%R/lib/profiled -L%R/usr/lib/profiled}\
    %{!maix64:%{!shared:%{g*:-lg}}}\
-   %{mpe:-L/usr/lpp/ppe.poe/lib -lmpi -lvtd}\
+   %{mpe:-L%R/usr/lpp/ppe.poe/lib -lmpi -lvtd}\
    %{pthread:-lpthreads} -lc"
 
 #undef LINK_SPEC
Index: gcc/config/rs6000/t-aix52
===================================================================
--- gcc/config/rs6000/t-aix52	2009-06-02 13:05:47.000000000 +0100
+++ gcc/config/rs6000/t-aix52	2009-06-02 13:06:03.000000000 +0100
@@ -47,7 +47,7 @@ SHLIB_LINK = $(GCC_FOR_TARGET) $(LIBGCC2
 	-Wl,-bE:@shlib_map_file@ -o @multilib_dir@/shr.o \
 	@multilib_flags@ @shlib_objs@ -lc \
 	`case @multilib_dir@ in \
-	*pthread*) echo -L/usr/lib/threads -lpthreads -lc_r /usr/lib/libc.a ;; \
+	*pthread*) echo -L$(TARGET_SYSTEM_ROOT)/usr/lib/threads -lpthreads -lc_r $(TARGET_SYSTEM_ROOT)/usr/lib/libc.a ;; \
 	*) echo -lc ;; esac` ; \
 	rm -f @multilib_dir@/tmp-@shlib_base_name@.a ; \
 	$(AR_CREATE_FOR_TARGET) @multilib_dir@/tmp-@shlib_base_name@.a \
Follow-Ups:
- Re: [2/8] Handle sysroots on AIX (needs build-system maintainer)
  - From: Paolo Bonzini
References:
- [0/8] AIX cross toolchains
  - From: Richard Sandiford
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