https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102826
Bug ID: 102826
Summary: Glibc "--disable-mathvec" configure option fail to
disable traces to libmvec
Product: gcc
Version: 12.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: fortran
Assignee: unassigned at gcc dot gnu.org
Reporter: haochen.jiang at intel dot com
Target Milestone: ---
When I build Glibc with "--disable-mathvec" and run through this simple
testcase:
program test_overloaded_intrinsic
real(4) :: x4(3200), y4(3200)
real(8) :: x8(3200), y8(3200)
y4 = sin(x4)
print *, y4
end
It reports error: undefined reference to `_ZGVeN8v_sin'
It is trying to find libmvec functions, while because of the disabling,
libmvec.so will not be generated.
When I go through gcc file. In gcc/config/gnu-user.h Line 156, we have:
#undef TARGET_F951_OPTIONS
#define TARGET_F951_OPTIONS "%{!nostdinc:\
%:fortran-preinclude-file(-fpre-include= math-vector-fortran.h finclude%s/)}"
, which is maybe the cause of the error. Because when I clear that
math-vector-fortran.h, the testcase will pass.
