https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65998
Bug ID: 65998
Summary: please support multiarch for the user search paths
(CPATH, etc.)
Product: gcc
Version: 5.1.1
Status: UNCONFIRMED
Severity: enhancement
Priority: P3
Component: preprocessor
Assignee: unassigned at gcc dot gnu.org
Reporter: vincent-gcc at vinc17 dot net
Target Milestone: ---
cpp currently supports multiarch search paths for /usr/local and /usr, but not
for directories supplied via environment variables like $CPATH and
$C_INCLUDE_PATH. For instance, "cpp -v" gives:
/usr/local/include/x86_64-linux-gnu
/usr/local/include
[...]
/usr/include/x86_64-linux-gnu
/usr/include
and when adding the -m32 option:
/usr/local/include/i386-linux-gnu
/usr/local/include
[...]
/usr/include/i386-linux-gnu
/usr/include
But if I use CPATH=/home/vlefevre/include, I just get:
/home/vlefevre/include
in the cpp output (while the subdirectories
/home/vlefevre/include/x86_64-linux-gnu and
/home/vlefevre/include/i386-linux-gnu exist too).
Adding the other subdirectory to $CPATH is not a good solution because one
doesn't always know the ABI (whether -m32 is present or not) in advance, i.e.
one doesn't know in advance which directory to add to $CPATH.
