From: Richard Purdie Subject: [PATCH 5/5] gcc: Pass sysroot options to cpp for preprocessed source OpenEmbedded/Yocto Project extensively uses the --sysroot support within gcc. We discovered that when compiling preprocessed source (.i or .ii files), the compiler will try and access the builtin sysroot location rather than the --sysroot option specified on the commandline. If access to that directory is permission denied (unreadable), gcc will error. This is particularly problematic when ccache is involved. This patch adds %I to the cpp-output spec macro so the default substitutions for -iprefix, -isystem, -isysroot happen and the correct sysroot is used. 2021-10-27 Richard Purdie gcc/cp/ChangeLog: * lang-specs.h: Pass sysroot options to cpp for preprocessed source gcc/ChangeLog: * gcc.c: Pass sysroot options to cpp for preprocessed source Signed-off-by: Richard Purdie [YOCTO #2074] Upstream-Status: Submitted [https://gcc.gnu.org/pipermail/gcc-patches/2021-October/582725.html] --- gcc/cp/lang-specs.h | 2 +- gcc/gcc.c | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-) Index: gcc-11.2.0/gcc/cp/lang-specs.h =================================================================== --- gcc-11.2.0.orig/gcc/cp/lang-specs.h +++ gcc-11.2.0/gcc/cp/lang-specs.h @@ -116,7 +116,7 @@ along with GCC; see the file COPYING3. {".ii", "@c++-cpp-output", 0, 0, 0}, {"@c++-cpp-output", "%{!E:%{!M:%{!MM:" - " cc1plus -fpreprocessed %i %(cc1_options) %2" + " cc1plus -fpreprocessed %i %I %(cc1_options) %2" " %{!fsyntax-only:" " %{fmodule-only:%{!S:-o %g.s%V}}" " %{!fmodule-only:%{!fmodule-header*:%(invoke_as)}}}" Index: gcc-11.2.0/gcc/gcc.c =================================================================== --- gcc-11.2.0.orig/gcc/gcc.c +++ gcc-11.2.0/gcc/gcc.c @@ -1470,7 +1470,7 @@ static const struct compiler default_com %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},