Hi,
With a sysroot of /dev/null, passing a .i file to cc1plus causes it to attempt to open /dev/null/usr/include, which fails. This causes problems
for ccache and distcc. There is an open bugzilla ticket at [1].
The patch below applies on to 4.6.3, but it appears the bug is still present in
4.7.2.
If this is not the correct way to solve this problem, please suggest a better
approach.
Regards,
Etienne Le Sueur
[1] http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54560
diff --git a/gcc-4.6.3/gcc/cp/lang-specs.h b/gcc-4.6.3/gcc/cp/lang-specs.h
index a73aba3..873609a 100644
--- a/gcc-4.6.3/gcc/cp/lang-specs.h
+++ b/gcc-4.6.3/gcc/cp/lang-specs.h
@@ -64,5 +64,5 @@ along with GCC; see the file COPYING3. If not see
{".ii", "@c++-cpp-output", 0, 0, 0},
{"@c++-cpp-output",
"%{!M:%{!MM:%{!E:\
- cc1plus -fpreprocessed %i %(cc1_options) %2\
+ cc1plus -fpreprocessed %i %I %(cc1_options) %2\
%{!fsyntax-only:%(invoke_as)}}}}", 0, 0, 0},
diff --git a/gcc-4.6.3/gcc/gcc.c b/gcc-4.6.3/gcc/gcc.c
index 75f522e..214ef29 100644
--- a/gcc-4.6.3/gcc/gcc.c
+++ b/gcc-4.6.3/gcc/gcc.c
@@ -950,7 +950,7 @@ static const struct compiler default_compilers[] =
%W{o*:--output-pch=%*}}%V}}}}}}", 0, 0, 0},
{".i", "@cpp-output", 0, 0, 0},
{"@cpp-output",
- "%{!M:%{!MM:%{!E:cc1 -fpreprocessed %i %(cc1_options)
%{!fsyntax-only:%(invoke_as)}}}}", 0, 0, 0},
+ "%{!M:%{!MM:%{!E:cc1 -fpreprocessed %i %I %(cc1_options)
%{!fsyntax-only:%(invoke_as)}}}}", 0, 0, 0},
{".s", "@assembler", 0, 0, 0},
{"@assembler",
"%{!M:%{!MM:%{!E:%{!S:as %(asm_debug) %(asm_options) %i %A }}}}", 0, 0, 0},
