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configure: Always detect -no-pie toolchain support

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The CFLAGS_NOPIE and LDFLAGS_NOPIE variables are used
in pc-bios/optionrom/Makefile, which has nothing to do
with the PIE setting of the main qemu executables.

This overrides any operating system default to build
all executables as PIE, which is important for ROMs.

Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Richard Henderson 2019-12-17 13:54:56 -10:00
parent d2cd29e307
commit b26341241b
1 changed files with 8 additions and 10 deletions
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18
configure vendored
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@ -2107,26 +2107,24 @@ if ! compile_prog "-Werror" "" ; then
"Thread-Local Storage (TLS). Please upgrade to a version that does."
fi
if test "$pie" != "no" ; then
cat > $TMPC << EOF
cat > $TMPC << EOF
#ifdef __linux__
# define THREAD __thread
#else
# define THREAD
#endif
static THREAD int tls_var;
int main(void) { return tls_var; }
EOF
# check we support --no-pie first...
if compile_prog "-Werror -fno-pie" "-no-pie"; then
CFLAGS_NOPIE="-fno-pie"
LDFLAGS_NOPIE="-nopie"
fi
# Check we support --no-pie first; we will need this for building ROMs.
if compile_prog "-Werror -fno-pie" "-no-pie"; then
CFLAGS_NOPIE="-fno-pie"
LDFLAGS_NOPIE="-no-pie"
fi
if test "$pie" != "no" ; then
if compile_prog "-fPIE -DPIE" "-pie"; then
QEMU_CFLAGS="-fPIE -DPIE $QEMU_CFLAGS"
QEMU_LDFLAGS="-pie $QEMU_LDFLAGS"