From 531b9df680c4380797e8e7705a8e7f8ed17ebe68 Mon Sep 17 00:00:00 2001
From: Khem Raj <raj.khem@gmail.com>
Date: Fri, 20 Feb 2015 10:25:11 +0000
Subject: [PATCH] Ensure target gcc headers can be included

There are a few headers installed as part of the OpenEmbedded
gcc-runtime target (omp.h, ssp/*.h). Being installed from a recipe
built for the target architecture, these are within the target
sysroot and not cross/nativesdk; thus they weren't able to be
found by gcc with the existing search paths. Add support for
picking up these headers under the sysroot supplied on the gcc
command line in order to resolve this.

Extend target gcc headers search to musl too

Upstream-Status: Inappropriate [embedded specific]

Signed-off-by: Paul Eggleton <paul.eggleton@linux.intel.com>
Signed-off-by: Khem Raj <raj.khem@gmail.com>
---
 gcc/Makefile.in           | 2 ++
 gcc/config/linux.h        | 8 ++++++++
 gcc/config/rs6000/sysv4.h | 8 ++++++++
 gcc/cppdefault.cc         | 4 ++++
 4 files changed, 22 insertions(+)

diff --git a/gcc/Makefile.in b/gcc/Makefile.in
index 04f28984b34..8ef996c0f4d 100644
--- a/gcc/Makefile.in
+++ b/gcc/Makefile.in
@@ -640,6 +640,7 @@ libexecdir = @libexecdir@
 
 # Directory in which the compiler finds libraries etc.
 libsubdir = $(libdir)/gcc/$(real_target_noncanonical)/$(version)$(accel_dir_suffix)
+libsubdir_target = $(target_noncanonical)/$(version)
 # Directory in which the compiler finds executables
 libexecsubdir = $(libexecdir)/gcc/$(real_target_noncanonical)/$(version)$(accel_dir_suffix)
 # Directory in which all plugin resources are installed
@@ -3059,6 +3060,7 @@ CFLAGS-intl.o += -DLOCALEDIR=\"$(localedir)\"
 
 PREPROCESSOR_DEFINES = \
   -DGCC_INCLUDE_DIR=\"$(libsubdir)/include\" \
+  -DGCC_INCLUDE_SUBDIR_TARGET=\"$(libsubdir_target)/include\" \
   -DFIXED_INCLUDE_DIR=\"$(libsubdir)/include-fixed\" \
   -DGPLUSPLUS_INCLUDE_DIR=\"$(gcc_gxx_include_dir)\" \
   -DGPLUSPLUS_INCLUDE_DIR_ADD_SYSROOT=$(gcc_gxx_include_dir_add_sysroot) \
diff --git a/gcc/config/linux.h b/gcc/config/linux.h
index 6491c6b84f5..57496ff1f2f 100644
--- a/gcc/config/linux.h
+++ b/gcc/config/linux.h
@@ -157,6 +157,13 @@ see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
 #define INCLUDE_DEFAULTS_MUSL_TOOL
 #endif
 
+#ifdef GCC_INCLUDE_SUBDIR_TARGET
+#define INCLUDE_DEFAULTS_MUSL_SUBDIR_TARGET		\
+    { STANDARD_STARTFILE_PREFIX_2 GCC_INCLUDE_SUBDIR_TARGET, "GCC", 0, 0, 1, 0},
+#else
+#define INCLUDE_DEFAULTS_MUSL_SUBDIR_TARGET
+#endif
+
 #ifdef NATIVE_SYSTEM_HEADER_DIR
 #define INCLUDE_DEFAULTS_MUSL_NATIVE			\
     { NATIVE_SYSTEM_HEADER_DIR, 0, 0, 0, 1, 2 },	\
@@ -183,6 +190,7 @@ see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
     INCLUDE_DEFAULTS_MUSL_PREFIX			\
     INCLUDE_DEFAULTS_MUSL_CROSS				\
     INCLUDE_DEFAULTS_MUSL_TOOL				\
+    INCLUDE_DEFAULTS_MUSL_SUBDIR_TARGET			\
     INCLUDE_DEFAULTS_MUSL_NATIVE			\
     { GCC_INCLUDE_DIR, "GCC", 0, 1, 0, 0 },		\
     { 0, 0, 0, 0, 0, 0 }				\
diff --git a/gcc/config/rs6000/sysv4.h b/gcc/config/rs6000/sysv4.h
index 26db003cb3a..3a443abcf6b 100644
--- a/gcc/config/rs6000/sysv4.h
+++ b/gcc/config/rs6000/sysv4.h
@@ -986,6 +986,13 @@ ncrtn.o%s"
 #define INCLUDE_DEFAULTS_MUSL_TOOL
 #endif
 
+#ifdef GCC_INCLUDE_SUBDIR_TARGET
+#define INCLUDE_DEFAULTS_MUSL_SUBDIR_TARGET            \
+    { STANDARD_STARTFILE_PREFIX_2 GCC_INCLUDE_SUBDIR_TARGET, "GCC", 0, 0, 1, 0},
+#else
+#define INCLUDE_DEFAULTS_MUSL_SUBDIR_TARGET
+#endif
+
 #ifdef NATIVE_SYSTEM_HEADER_DIR
 #define INCLUDE_DEFAULTS_MUSL_NATIVE			\
     { NATIVE_SYSTEM_HEADER_DIR, 0, 0, 0, 1, 2 },	\
@@ -1012,6 +1019,7 @@ ncrtn.o%s"
     INCLUDE_DEFAULTS_MUSL_PREFIX			\
     INCLUDE_DEFAULTS_MUSL_CROSS				\
     INCLUDE_DEFAULTS_MUSL_TOOL				\
+    INCLUDE_DEFAULTS_MUSL_SUBDIR_TARGET			\
     INCLUDE_DEFAULTS_MUSL_NATIVE			\
     { GCC_INCLUDE_DIR, "GCC", 0, 1, 0, 0 },		\
     { 0, 0, 0, 0, 0, 0 }				\
diff --git a/gcc/cppdefault.cc b/gcc/cppdefault.cc
index 141bb4d25f6..734590a7059 100644
--- a/gcc/cppdefault.cc
+++ b/gcc/cppdefault.cc
@@ -64,6 +64,10 @@ const struct default_include cpp_include_defaults[]
     /* This is the dir for gcc's private headers.  */
     { GCC_INCLUDE_DIR, "GCC", 0, 0, 0, 0 },
 #endif
+#ifdef GCC_INCLUDE_SUBDIR_TARGET
+    /* This is the dir for gcc's private headers under the specified sysroot.  */
+    { STANDARD_STARTFILE_PREFIX_2 GCC_INCLUDE_SUBDIR_TARGET, "GCC", 0, 0, 1, 0 },
+#endif
 #ifdef LOCAL_INCLUDE_DIR
     /* /usr/local/include comes before the fixincluded header files.  */
     { LOCAL_INCLUDE_DIR, 0, 0, 1, 1, 2 },
