[patch] Add include-fixed to include search paths for libgcc on VxWorks

[patch] Add include-fixed to include search paths for libgcc on VxWorks

[Olivier Hainque]

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The special vxworks rules for the compilation of libgcc had
-I.../gcc/include and not .../gcc/include-fixed, causing build
failure of our arm-vxworks7r2 port because of indirect dependencies
on limits.h.

The omission was just an oversight and this change just adds the
missing -I,

This fixes the aforementioned build failure, has been used in gcc-9
based production compilers for several targets for a year, passed a build
& test sequence for powerpc-vxworks7 with gcc-10 and a sanity check build
with a recent mainline.

Committing to mainline shortly.

Olivier

2020-09-24  Olivier Hainque  <hainque@adacore.com>

libgcc/
        * config/t-vxworks: Add include-fixed to include search
        paths for libgcc on VxWorks.
        * config/t-vxworks7: Likewise.


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diff --git a/libgcc/config/t-vxworks b/libgcc/config/t-vxworks
index 757cead6724..e1f1e937687 100644
--- a/libgcc/config/t-vxworks
+++ b/libgcc/config/t-vxworks
@@ -12,6 +12,7 @@ LIB2ADD += $(srcdir)/config/vxcache.c
 # prevail (e.g. unwind.h), and that gcc provided header files intended
 # to be user visible eventually are visible as well.
 LIBGCC2_INCLUDES = -nostdinc -I. \
+  -I$(MULTIBUILDTOP)../../gcc/include-fixed \
   -I$(MULTIBUILDTOP)../../gcc/include \
   `case "/$(MULTIDIR)" in \
      */mrtp*) echo -I$(WIND_USR)/h -I$(WIND_USR)/h/wrn/coreip ;; \
diff --git a/libgcc/config/t-vxworks7 b/libgcc/config/t-vxworks7
index f2cc904ac08..75f6cb4a29f 100644
--- a/libgcc/config/t-vxworks7
+++ b/libgcc/config/t-vxworks7
@@ -12,6 +12,7 @@ LIB2ADD += $(srcdir)/config/vxcache.c
 # prevail (e.g. unwind.h), and that gcc provided header files intended
 # to be user visible eventually are visible as well.
 LIBGCC2_INCLUDES = -nostdinc -I. \
+  -I$(MULTIBUILDTOP)../../gcc/include-fixed \
   -I$(VSB_DIR)/h -I$(VSB_DIR)/share/h \
   -I$(MULTIBUILDTOP)../../gcc/include \
   `case "/$(MULTIDIR)" in \
-- 
2.17.1


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