| Message ID | 20191218031920.6414-5-richard.henderson@linaro.org (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | configure: Improve PIE and other linkage | expand |
On 18/12/2019 04.19, Richard Henderson wrote: > 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. > > Signed-off-by: Richard Henderson <richard.henderson@linaro.org> > --- > configure | 18 ++++++++---------- > 1 file changed, 8 insertions(+), 10 deletions(-) Reviewed-by: Thomas Huth <thuth@redhat.com>
On 12/18/19 4:19 AM, Richard Henderson wrote: > 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. > > Signed-off-by: Richard Henderson <richard.henderson@linaro.org> > --- > configure | 18 ++++++++---------- > 1 file changed, 8 insertions(+), 10 deletions(-) > > diff --git a/configure b/configure > index 2fb4457d7c..972ce7396f 100755 > --- a/configure > +++ b/configure > @@ -2012,26 +2012,24 @@ 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" > LDFLAGS="-pie $LDFLAGS" > Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
diff --git a/configure b/configure index 2fb4457d7c..972ce7396f 100755 --- a/configure +++ b/configure @@ -2012,26 +2012,24 @@ if ! compile_prog "-Werror" "" ; then "Thread-Local Storage (TLS). Please upgrade to a version that does." fi -if test "$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" LDFLAGS="-pie $LDFLAGS"
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. Signed-off-by: Richard Henderson <richard.henderson@linaro.org> --- configure | 18 ++++++++---------- 1 file changed, 8 insertions(+), 10 deletions(-)