https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105391
Bug ID: 105391 Summary: gm2 doesn't heed --with-gmp* Product: gcc Version: 12.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: modula2 Assignee: gaius at gcc dot gnu.org Reporter: ro at gcc dot gnu.org Target Milestone: --- When building the current devel/modula-2 branch on i686-pc-linux-gnu for comparison's sake, the build failed like this In file included from /vol/gcc/src/hg/master/modula-2/gcc/m2/mc-boot/GAssertion.c:29: /vol/gcc/src/hg/master/modula-2/gcc/system.h:702:10: fatal error: gmp.h: No such file or directory 702 | #include <gmp.h> | ^~~~~~~ compilation terminated. and many many more similar errors. The system in question hadn't installed gmp.h in system directories, but only in a separate prefix specified with --with-gmp. However, gcc/m2/Make-lang.in doesn't heed GMPINC/GMPLIB. The attached patch fixes this by adding $(INCLUDES) in many places. It was enough to let the build succeed, but is certainly hacky in that it may add the variable in more places than necessary. I found the makefile extremely hard to deal with because it's extremely repetitive.