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sys/targets: use -m31 gcc option on s390x arch for 32bit targets

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In ESA/S390 mode, the CPU is able to address only 31bit of
memory address space. GCC on s390x expects the flag -m31 instead
of -m32 for 32bit code.

Signed-off-by: Alexander Egorenkov <Alexander.Egorenkov@ibm.com>
This commit is contained in:
Alexander Egorenkov 2020-09-16 19:01:36 +02:00 committed by Dmitry Vyukov
parent 8247808b71
commit 8c70a2f7b7
1 changed files with 8 additions and 0 deletions
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8
sys/targets/targets.go
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@ -476,6 +476,14 @@ func init() {
// to link against the libc++ library.
target.CFlags = append(target.CFlags, "-lc++")
}
// In ESA/390 mode, the CPU is able to address only 31bit of memory but
// arithmetic operations are still 32bit
// Fix cflags by replacing compiler's -m32 option with -m31
if goarch == "s390x" {
for i := range target.CFlags {
target.CFlags[i] = strings.Replace(target.CFlags[i], "-m32", "-m31", -1)
}
}
}
if target.PtrSize == 4 && goos == "freebsd" && goarch == "amd64" {
// A hack to let 32-bit "test" target tests run on FreeBSD: