nixpkgs/pkgs/development/compilers/gcc/4.5/no-sys-dirs.patch

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diff -ru gcc-4.3.1-orig/gcc/cppdefault.c gcc-4.3.1/gcc/cppdefault.c
--- gcc-4.3.1-orig/gcc/cppdefault.c 2007-07-26 10:37:01.000000000 +0200
+++ gcc-4.3.1/gcc/cppdefault.c 2008-06-25 17:48:23.000000000 +0200
@@ -41,6 +41,10 @@
# undef CROSS_INCLUDE_DIR
#endif
+#undef LOCAL_INCLUDE_DIR
+#undef SYSTEM_INCLUDE_DIR
+#undef STANDARD_INCLUDE_DIR
+
const struct default_include cpp_include_defaults[]
#ifdef INCLUDE_DEFAULTS
= INCLUDE_DEFAULTS;
diff -ru gcc-4.3.1-orig/gcc/gcc.c gcc-4.3.1/gcc/gcc.c
--- gcc-4.3.1-orig/gcc/gcc.c 2008-03-02 23:55:19.000000000 +0100
+++ gcc-4.3.1/gcc/gcc.c 2008-06-25 17:52:53.000000000 +0200
@@ -1478,10 +1478,10 @@
/* Default prefixes to attach to command names. */
#ifndef STANDARD_STARTFILE_PREFIX_1
-#define STANDARD_STARTFILE_PREFIX_1 "/lib/"
+#define STANDARD_STARTFILE_PREFIX_1 ""
#endif
#ifndef STANDARD_STARTFILE_PREFIX_2
-#define STANDARD_STARTFILE_PREFIX_2 "/usr/lib/"
+#define STANDARD_STARTFILE_PREFIX_2 ""
#endif
#ifdef CROSS_DIRECTORY_STRUCTURE /* Don't use these prefixes for a cross compiler. */
--- gcc-4.3.1-orig/gcc/Makefile.in 2008-05-11 20:54:15.000000000 +0200
+++ gcc-4.3.1/gcc/Makefile.in 2008-06-25 17:48:23.000000000 +0200
@@ -378,7 +378,11 @@
MD5_H = $(srcdir)/../include/md5.h
# Default native SYSTEM_HEADER_DIR, to be overridden by targets.
-NATIVE_SYSTEM_HEADER_DIR = /usr/include
+# Nix: we override NATIVE_SYSTEM_HEADER_DIR in order to prevent
+# `fixinc' from fixing header files in /usr/include. However,
+# NATIVE_SYSTEM_HEADER_DIR must point to an existing directory, so set
+# it to some dummy directory.
+NATIVE_SYSTEM_HEADER_DIR = $(NIX_FIXINC_DUMMY)
# Default cross SYSTEM_HEADER_DIR, to be overridden by targets.
CROSS_SYSTEM_HEADER_DIR = @CROSS_SYSTEM_HEADER_DIR@
@@ -3277,7 +3281,7 @@
-DGPLUSPLUS_INCLUDE_DIR=\"$(gcc_gxx_include_dir)\" \
-DGPLUSPLUS_TOOL_INCLUDE_DIR=\"$(gcc_gxx_include_dir)/$(target_noncanonical)\" \
-DGPLUSPLUS_BACKWARD_INCLUDE_DIR=\"$(gcc_gxx_include_dir)/backward\" \
- -DLOCAL_INCLUDE_DIR=\"$(local_includedir)\" \
+ -DLOCAL_INCLUDE_DIR=\"/no-such-dir\" \
-DCROSS_INCLUDE_DIR=\"$(CROSS_SYSTEM_HEADER_DIR)\" \
-DTOOL_INCLUDE_DIR=\"$(gcc_tooldir)/include\" \
-DPREFIX=\"$(prefix)/\" \