From 6f410ed8fb7eee11ba7a25634c2257666b98ef52 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: Pending

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.c          | 4 ++++
 4 files changed, 22 insertions(+)

diff --git a/gcc/Makefile.in b/gcc/Makefile.in
index 59c45c81393..9b17d120aa1 100644
--- a/gcc/Makefile.in
+++ b/gcc/Makefile.in
@@ -630,6 +630,7 @@ 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
@@ -3016,6 +3017,7 @@ 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 87efc5f69fe..b525bcd56b3 100644
--- a/gcc/config/linux.h
+++ b/gcc/config/linux.h
@@ -165,6 +165,13 @@ 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 },	\
@@ -191,6 +198,7 @@ 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 510abe169c5..0c2bba5ea32 100644
--- a/gcc/config/rs6000/sysv4.h
+++ b/gcc/config/rs6000/sysv4.h
@@ -995,6 +995,13 @@ 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 },	\
@@ -1021,6 +1028,7 @@ 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.c b/gcc/cppdefault.c
index c503d14fc3f..d54d6ce0076 100644
--- a/gcc/cppdefault.c
+++ b/gcc/cppdefault.c
@@ -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 },
