| Message ID | 20170111162841.15569-2-alex.bennee@linaro.org |
|---|---|
| State | New |
| Headers | show |
On 11/01/2017 17:28, Alex Bennée wrote: > So we can have portable formatting of uint32_t types. However there is > a catch. Different compilers can use legally subtly different types > though so we need to probe the compiler defined intdef.h first. Interesting, what platform has long uint32_t? I thought the issue was whether 64-bit is long or "long long". Paolo > Signed-off-by: Alex Bennée <alex.bennee@linaro.org> > --- > Makefile | 1 + > configure | 13 +++++++++++++ > lib/libcflat.h | 9 +++++++++ > 3 files changed, 23 insertions(+) > > diff --git a/Makefile b/Makefile > index a32333b..9822d9a 100644 > --- a/Makefile > +++ b/Makefile > @@ -55,6 +55,7 @@ CFLAGS += $(fomit_frame_pointer) > CFLAGS += $(fno_stack_protector) > CFLAGS += $(fno_stack_protector_all) > CFLAGS += $(wno_frame_address) > +CFLAGS += $(if $(U32_LONG_FMT),-D__U32_LONG_FMT__,) > > CXXFLAGS += $(CFLAGS) > > diff --git a/configure b/configure > index 995c8fa..127868c 100755 > --- a/configure > +++ b/configure > @@ -109,6 +109,18 @@ if [ -f $testdir/run ]; then > ln -fs $testdir/run $testdir-run > fi > > +# check if uint32_t needs a long format modifier > +cat << EOF > lib_test.c > +#include <inttypes.h> > +EOF > + > +$cross_prefix$cc lib_test.c -E | grep "typedef" | grep "long" | grep "uint32_t" &> /dev/null > +exit=$? > +if [ $exit -eq 0 ]; then > + u32_long=true > +fi > +rm -f lib_test.c > + > # check for dependent 32 bit libraries > if [ "$arch" != "arm" ]; then > cat << EOF > lib_test.c > @@ -155,4 +167,5 @@ TEST_DIR=$testdir > FIRMWARE=$firmware > ENDIAN=$endian > PRETTY_PRINT_STACKS=$pretty_print_stacks > +U32_LONG_FMT=$u32_long > EOF > diff --git a/lib/libcflat.h b/lib/libcflat.h > index 380395f..e80fc50 100644 > --- a/lib/libcflat.h > +++ b/lib/libcflat.h > @@ -58,12 +58,21 @@ typedef _Bool bool; > #define true 1 > > #if __SIZEOF_LONG__ == 8 > +# define __PRI32_PREFIX > # define __PRI64_PREFIX "l" > # define __PRIPTR_PREFIX "l" > #else > +#if defined(__U32_LONG_FMT__) > +# define __PRI32_PREFIX "l" > +#else > +# define __PRI32_PREFIX > +#endif > # define __PRI64_PREFIX "ll" > # define __PRIPTR_PREFIX > #endif > +#define PRId32 __PRI32_PREFIX "d" > +#define PRIu32 __PRI32_PREFIX "u" > +#define PRIx32 __PRI32_PREFIX "x" > #define PRId64 __PRI64_PREFIX "d" > #define PRIu64 __PRI64_PREFIX "u" > #define PRIx64 __PRI64_PREFIX "x" >
Paolo Bonzini <pbonzini@redhat.com> writes: > On 11/01/2017 17:28, Alex Bennée wrote: >> So we can have portable formatting of uint32_t types. However there is >> a catch. Different compilers can use legally subtly different types >> though so we need to probe the compiler defined intdef.h first. > > Interesting, what platform has long uint32_t? I thought the issue was > whether 64-bit is long or "long long". I haven't run into that one. This came up with the arm-none-eabi-gcc on my overdrive01 box. According to the toolchain guys there is no particular reason a 32bit compiler can't use long for its natural word length. The native compiler on Debian armhf doesn't do this but the arm-none-eabi-gcc compilers on both 64bit and 32bit Debian need this. > > Paolo > >> Signed-off-by: Alex Bennée <alex.bennee@linaro.org> >> --- >> Makefile | 1 + >> configure | 13 +++++++++++++ >> lib/libcflat.h | 9 +++++++++ >> 3 files changed, 23 insertions(+) >> >> diff --git a/Makefile b/Makefile >> index a32333b..9822d9a 100644 >> --- a/Makefile >> +++ b/Makefile >> @@ -55,6 +55,7 @@ CFLAGS += $(fomit_frame_pointer) >> CFLAGS += $(fno_stack_protector) >> CFLAGS += $(fno_stack_protector_all) >> CFLAGS += $(wno_frame_address) >> +CFLAGS += $(if $(U32_LONG_FMT),-D__U32_LONG_FMT__,) >> >> CXXFLAGS += $(CFLAGS) >> >> diff --git a/configure b/configure >> index 995c8fa..127868c 100755 >> --- a/configure >> +++ b/configure >> @@ -109,6 +109,18 @@ if [ -f $testdir/run ]; then >> ln -fs $testdir/run $testdir-run >> fi >> >> +# check if uint32_t needs a long format modifier >> +cat << EOF > lib_test.c >> +#include <inttypes.h> >> +EOF >> + >> +$cross_prefix$cc lib_test.c -E | grep "typedef" | grep "long" | grep "uint32_t" &> /dev/null >> +exit=$? >> +if [ $exit -eq 0 ]; then >> + u32_long=true >> +fi >> +rm -f lib_test.c >> + >> # check for dependent 32 bit libraries >> if [ "$arch" != "arm" ]; then >> cat << EOF > lib_test.c >> @@ -155,4 +167,5 @@ TEST_DIR=$testdir >> FIRMWARE=$firmware >> ENDIAN=$endian >> PRETTY_PRINT_STACKS=$pretty_print_stacks >> +U32_LONG_FMT=$u32_long >> EOF >> diff --git a/lib/libcflat.h b/lib/libcflat.h >> index 380395f..e80fc50 100644 >> --- a/lib/libcflat.h >> +++ b/lib/libcflat.h >> @@ -58,12 +58,21 @@ typedef _Bool bool; >> #define true 1 >> >> #if __SIZEOF_LONG__ == 8 >> +# define __PRI32_PREFIX >> # define __PRI64_PREFIX "l" >> # define __PRIPTR_PREFIX "l" >> #else >> +#if defined(__U32_LONG_FMT__) >> +# define __PRI32_PREFIX "l" >> +#else >> +# define __PRI32_PREFIX >> +#endif >> # define __PRI64_PREFIX "ll" >> # define __PRIPTR_PREFIX >> #endif >> +#define PRId32 __PRI32_PREFIX "d" >> +#define PRIu32 __PRI32_PREFIX "u" >> +#define PRIx32 __PRI32_PREFIX "x" >> #define PRId64 __PRI64_PREFIX "d" >> #define PRIu64 __PRI64_PREFIX "u" >> #define PRIx64 __PRI64_PREFIX "x" >> -- Alex Bennée
On Thu, Jan 12, 2017 at 01:29:24PM +0100, Paolo Bonzini wrote: > > > On 11/01/2017 17:28, Alex Bennée wrote: > > So we can have portable formatting of uint32_t types. However there is > > a catch. Different compilers can use legally subtly different types > > though so we need to probe the compiler defined intdef.h first. > > Interesting, what platform has long uint32_t? I thought the issue was > whether 64-bit is long or "long long". > > Paolo > > > Signed-off-by: Alex Bennée <alex.bennee@linaro.org> > > --- > > Makefile | 1 + > > configure | 13 +++++++++++++ > > lib/libcflat.h | 9 +++++++++ > > 3 files changed, 23 insertions(+) > > > > diff --git a/Makefile b/Makefile > > index a32333b..9822d9a 100644 > > --- a/Makefile > > +++ b/Makefile > > @@ -55,6 +55,7 @@ CFLAGS += $(fomit_frame_pointer) > > CFLAGS += $(fno_stack_protector) > > CFLAGS += $(fno_stack_protector_all) > > CFLAGS += $(wno_frame_address) > > +CFLAGS += $(if $(U32_LONG_FMT),-D__U32_LONG_FMT__,) > > > > CXXFLAGS += $(CFLAGS) > > > > diff --git a/configure b/configure > > index 995c8fa..127868c 100755 > > --- a/configure > > +++ b/configure > > @@ -109,6 +109,18 @@ if [ -f $testdir/run ]; then > > ln -fs $testdir/run $testdir-run > > fi > > > > +# check if uint32_t needs a long format modifier > > +cat << EOF > lib_test.c > > +#include <inttypes.h> > > +EOF > > + > > +$cross_prefix$cc lib_test.c -E | grep "typedef" | grep "long" | grep "uint32_t" &> /dev/null This won't work with cross compilers that don't have inttypes.h in their path (like mine). How about something like cat << EOF > lib_test.c __UINT32_TYPE__ EOF u32_long="`aarch64-linux-gnu-gcc lib_test.c -E | awk '/unsigned/ && $2 == "long"'`" Although I feel there should be a compiler macro way to do this without a need for configure/makefile trickery at all... Thanks, drew > > +exit=$? > > +if [ $exit -eq 0 ]; then > > + u32_long=true > > +fi > > +rm -f lib_test.c > > + > > # check for dependent 32 bit libraries > > if [ "$arch" != "arm" ]; then > > cat << EOF > lib_test.c > > @@ -155,4 +167,5 @@ TEST_DIR=$testdir > > FIRMWARE=$firmware > > ENDIAN=$endian > > PRETTY_PRINT_STACKS=$pretty_print_stacks > > +U32_LONG_FMT=$u32_long > > EOF > > diff --git a/lib/libcflat.h b/lib/libcflat.h > > index 380395f..e80fc50 100644 > > --- a/lib/libcflat.h > > +++ b/lib/libcflat.h > > @@ -58,12 +58,21 @@ typedef _Bool bool; > > #define true 1 > > > > #if __SIZEOF_LONG__ == 8 > > +# define __PRI32_PREFIX > > # define __PRI64_PREFIX "l" > > # define __PRIPTR_PREFIX "l" > > #else > > +#if defined(__U32_LONG_FMT__) > > +# define __PRI32_PREFIX "l" > > +#else > > +# define __PRI32_PREFIX > > +#endif > > # define __PRI64_PREFIX "ll" > > # define __PRIPTR_PREFIX > > #endif > > +#define PRId32 __PRI32_PREFIX "d" > > +#define PRIu32 __PRI32_PREFIX "u" > > +#define PRIx32 __PRI32_PREFIX "x" > > #define PRId64 __PRI64_PREFIX "d" > > #define PRIu64 __PRI64_PREFIX "u" > > #define PRIx64 __PRI64_PREFIX "x" > > > -- > To unsubscribe from this list: send the line "unsubscribe kvm" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
Andrew Jones <drjones@redhat.com> writes: > On Thu, Jan 12, 2017 at 01:29:24PM +0100, Paolo Bonzini wrote: >> >> >> On 11/01/2017 17:28, Alex Bennée wrote: >> > So we can have portable formatting of uint32_t types. However there is >> > a catch. Different compilers can use legally subtly different types >> > though so we need to probe the compiler defined intdef.h first. >> >> Interesting, what platform has long uint32_t? I thought the issue was >> whether 64-bit is long or "long long". >> >> Paolo >> >> > Signed-off-by: Alex Bennée <alex.bennee@linaro.org> >> > --- >> > Makefile | 1 + >> > configure | 13 +++++++++++++ >> > lib/libcflat.h | 9 +++++++++ >> > 3 files changed, 23 insertions(+) >> > >> > diff --git a/Makefile b/Makefile >> > index a32333b..9822d9a 100644 >> > --- a/Makefile >> > +++ b/Makefile >> > @@ -55,6 +55,7 @@ CFLAGS += $(fomit_frame_pointer) >> > CFLAGS += $(fno_stack_protector) >> > CFLAGS += $(fno_stack_protector_all) >> > CFLAGS += $(wno_frame_address) >> > +CFLAGS += $(if $(U32_LONG_FMT),-D__U32_LONG_FMT__,) >> > >> > CXXFLAGS += $(CFLAGS) >> > >> > diff --git a/configure b/configure >> > index 995c8fa..127868c 100755 >> > --- a/configure >> > +++ b/configure >> > @@ -109,6 +109,18 @@ if [ -f $testdir/run ]; then >> > ln -fs $testdir/run $testdir-run >> > fi >> > >> > +# check if uint32_t needs a long format modifier >> > +cat << EOF > lib_test.c >> > +#include <inttypes.h> >> > +EOF >> > + >> > +$cross_prefix$cc lib_test.c -E | grep "typedef" | grep "long" | grep "uint32_t" &> /dev/null > > This won't work with cross compilers that don't have inttypes.h in their > path (like mine). How about something like Hmm good point, in my case inttypes.h came from the libnewlib-dev package. > > cat << EOF > lib_test.c > __UINT32_TYPE__ > EOF > u32_long="`aarch64-linux-gnu-gcc lib_test.c -E | awk '/unsigned/ && $2 == "long"'`" Hmm it is not clear from the docs if this is a GCCism. If it is do we care? Also the docs do say: "Some of these macros may not be defined on particular systems if GCC does not provide a stdint.h header on those systems. " > Although I feel there should be a compiler macro way to do this without > a need for configure/makefile trickery at all... I did ask our toolchain bods. They started going on about potential solutions using _Generic but I fear that might be worse in this case! > > Thanks, > drew > > >> > +exit=$? >> > +if [ $exit -eq 0 ]; then >> > + u32_long=true >> > +fi >> > +rm -f lib_test.c >> > + >> > # check for dependent 32 bit libraries >> > if [ "$arch" != "arm" ]; then >> > cat << EOF > lib_test.c >> > @@ -155,4 +167,5 @@ TEST_DIR=$testdir >> > FIRMWARE=$firmware >> > ENDIAN=$endian >> > PRETTY_PRINT_STACKS=$pretty_print_stacks >> > +U32_LONG_FMT=$u32_long >> > EOF >> > diff --git a/lib/libcflat.h b/lib/libcflat.h >> > index 380395f..e80fc50 100644 >> > --- a/lib/libcflat.h >> > +++ b/lib/libcflat.h >> > @@ -58,12 +58,21 @@ typedef _Bool bool; >> > #define true 1 >> > >> > #if __SIZEOF_LONG__ == 8 >> > +# define __PRI32_PREFIX >> > # define __PRI64_PREFIX "l" >> > # define __PRIPTR_PREFIX "l" >> > #else >> > +#if defined(__U32_LONG_FMT__) >> > +# define __PRI32_PREFIX "l" >> > +#else >> > +# define __PRI32_PREFIX >> > +#endif >> > # define __PRI64_PREFIX "ll" >> > # define __PRIPTR_PREFIX >> > #endif >> > +#define PRId32 __PRI32_PREFIX "d" >> > +#define PRIu32 __PRI32_PREFIX "u" >> > +#define PRIx32 __PRI32_PREFIX "x" >> > #define PRId64 __PRI64_PREFIX "d" >> > #define PRIu64 __PRI64_PREFIX "u" >> > #define PRIx64 __PRI64_PREFIX "x" >> > >> -- >> To unsubscribe from this list: send the line "unsubscribe kvm" in >> the body of a message to majordomo@vger.kernel.org >> More majordomo info at http://vger.kernel.org/majordomo-info.html -- Alex Bennée
On Thu, Jan 12, 2017 at 05:18:25PM +0000, Alex Bennée wrote: > > Andrew Jones <drjones@redhat.com> writes: > > > On Thu, Jan 12, 2017 at 01:29:24PM +0100, Paolo Bonzini wrote: > >> > >> > >> On 11/01/2017 17:28, Alex Bennée wrote: > >> > So we can have portable formatting of uint32_t types. However there is > >> > a catch. Different compilers can use legally subtly different types > >> > though so we need to probe the compiler defined intdef.h first. > >> > >> Interesting, what platform has long uint32_t? I thought the issue was > >> whether 64-bit is long or "long long". > >> > >> Paolo > >> > >> > Signed-off-by: Alex Bennée <alex.bennee@linaro.org> > >> > --- > >> > Makefile | 1 + > >> > configure | 13 +++++++++++++ > >> > lib/libcflat.h | 9 +++++++++ > >> > 3 files changed, 23 insertions(+) > >> > > >> > diff --git a/Makefile b/Makefile > >> > index a32333b..9822d9a 100644 > >> > --- a/Makefile > >> > +++ b/Makefile > >> > @@ -55,6 +55,7 @@ CFLAGS += $(fomit_frame_pointer) > >> > CFLAGS += $(fno_stack_protector) > >> > CFLAGS += $(fno_stack_protector_all) > >> > CFLAGS += $(wno_frame_address) > >> > +CFLAGS += $(if $(U32_LONG_FMT),-D__U32_LONG_FMT__,) > >> > > >> > CXXFLAGS += $(CFLAGS) > >> > > >> > diff --git a/configure b/configure > >> > index 995c8fa..127868c 100755 > >> > --- a/configure > >> > +++ b/configure > >> > @@ -109,6 +109,18 @@ if [ -f $testdir/run ]; then > >> > ln -fs $testdir/run $testdir-run > >> > fi > >> > > >> > +# check if uint32_t needs a long format modifier > >> > +cat << EOF > lib_test.c > >> > +#include <inttypes.h> > >> > +EOF > >> > + > >> > +$cross_prefix$cc lib_test.c -E | grep "typedef" | grep "long" | grep "uint32_t" &> /dev/null > > > > This won't work with cross compilers that don't have inttypes.h in their > > path (like mine). How about something like > > Hmm good point, in my case inttypes.h came from the libnewlib-dev package. > > > > > cat << EOF > lib_test.c > > __UINT32_TYPE__ > > EOF > > u32_long="`aarch64-linux-gnu-gcc lib_test.c -E | awk '/unsigned/ && $2 == "long"'`" > > Hmm it is not clear from the docs if this is a GCCism. If it is do we > care? Also the docs do say: I think we're pretty bound to gcc already. I guess until somebody picks up the effort to get clang, or whatever, compiling runnable kvm-unit-tests, and commits to maintaining it, then I wouldn't worry too much about it... > > "Some of these macros may not be defined on particular systems if GCC does not provide a stdint.h header on those systems. " We already expect stdint.h, we include it from libcflat.h. > > > Although I feel there should be a compiler macro way to do this without > > a need for configure/makefile trickery at all... > > I did ask our toolchain bods. They started going on about potential > solutions using _Generic but I fear that might be worse in this case! Yikes :-) drew > > > > > Thanks, > > drew > > > > > >> > +exit=$? > >> > +if [ $exit -eq 0 ]; then > >> > + u32_long=true > >> > +fi > >> > +rm -f lib_test.c > >> > + > >> > # check for dependent 32 bit libraries > >> > if [ "$arch" != "arm" ]; then > >> > cat << EOF > lib_test.c > >> > @@ -155,4 +167,5 @@ TEST_DIR=$testdir > >> > FIRMWARE=$firmware > >> > ENDIAN=$endian > >> > PRETTY_PRINT_STACKS=$pretty_print_stacks > >> > +U32_LONG_FMT=$u32_long > >> > EOF > >> > diff --git a/lib/libcflat.h b/lib/libcflat.h > >> > index 380395f..e80fc50 100644 > >> > --- a/lib/libcflat.h > >> > +++ b/lib/libcflat.h > >> > @@ -58,12 +58,21 @@ typedef _Bool bool; > >> > #define true 1 > >> > > >> > #if __SIZEOF_LONG__ == 8 > >> > +# define __PRI32_PREFIX > >> > # define __PRI64_PREFIX "l" > >> > # define __PRIPTR_PREFIX "l" > >> > #else > >> > +#if defined(__U32_LONG_FMT__) > >> > +# define __PRI32_PREFIX "l" > >> > +#else > >> > +# define __PRI32_PREFIX > >> > +#endif > >> > # define __PRI64_PREFIX "ll" > >> > # define __PRIPTR_PREFIX > >> > #endif > >> > +#define PRId32 __PRI32_PREFIX "d" > >> > +#define PRIu32 __PRI32_PREFIX "u" > >> > +#define PRIx32 __PRI32_PREFIX "x" > >> > #define PRId64 __PRI64_PREFIX "d" > >> > #define PRIu64 __PRI64_PREFIX "u" > >> > #define PRIx64 __PRI64_PREFIX "x" > >> > > >> -- > >> To unsubscribe from this list: send the line "unsubscribe kvm" in > >> the body of a message to majordomo@vger.kernel.org > >> More majordomo info at http://vger.kernel.org/majordomo-info.html > > > -- > Alex Bennée _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
On 12/01/2017 18:18, Alex Bennée wrote: >> Although I feel there should be a compiler macro way to do this without >> a need for configure/makefile trickery at all... > > I did ask our toolchain bods. They started going on about potential > solutions using _Generic but I fear that might be worse in this case! I don't think _Generic can do string concatenation, can it? inttypes.h is not part of the set of freestanding headers, only stdint.h is. Who is providing stdint.h in your case? Paolo
Paolo Bonzini <pbonzini@redhat.com> writes: > On 12/01/2017 18:18, Alex Bennée wrote: >>> Although I feel there should be a compiler macro way to do this without >>> a need for configure/makefile trickery at all... >> >> I did ask our toolchain bods. They started going on about potential >> solutions using _Generic but I fear that might be worse in this case! > > I don't think _Generic can do string concatenation, can it? > > inttypes.h is not part of the set of freestanding headers, only stdint.h > is. Who is providing stdint.h in your case? /usr/lib/gcc/arm-none-eabi/5.4.1/include/stdint.h is part of the compiler package although it can just include the lib stdint.h if it is there: #ifndef _GCC_WRAP_STDINT_H #if __STDC_HOSTED__ # if defined __cplusplus && __cplusplus >= 201103L # undef __STDC_LIMIT_MACROS # define __STDC_LIMIT_MACROS # undef __STDC_CONSTANT_MACROS # define __STDC_CONSTANT_MACROS # endif # include_next <stdint.h> #else # include "stdint-gcc.h" #endif #define _GCC_WRAP_STDINT_H #endif So using inttypes we would get: >arm-none-eabi-gcc ./test.c -E | grep typedef | grep uint32 typedef long unsigned int __uint32_t; typedef __uint32_t uint32_t ; -- Alex Bennée
On Thu, Jan 12, 2017 at 05:56:29PM +0100, Andrew Jones wrote: > On Thu, Jan 12, 2017 at 01:29:24PM +0100, Paolo Bonzini wrote: > > > > > > On 11/01/2017 17:28, Alex Bennée wrote: > > > So we can have portable formatting of uint32_t types. However there is > > > a catch. Different compilers can use legally subtly different types > > > though so we need to probe the compiler defined intdef.h first. > > > > Interesting, what platform has long uint32_t? I thought the issue was > > whether 64-bit is long or "long long". > > > > Paolo > > > > > Signed-off-by: Alex Bennée <alex.bennee@linaro.org> > > > --- > > > Makefile | 1 + > > > configure | 13 +++++++++++++ > > > lib/libcflat.h | 9 +++++++++ > > > 3 files changed, 23 insertions(+) > > > > > > diff --git a/Makefile b/Makefile > > > index a32333b..9822d9a 100644 > > > --- a/Makefile > > > +++ b/Makefile > > > @@ -55,6 +55,7 @@ CFLAGS += $(fomit_frame_pointer) > > > CFLAGS += $(fno_stack_protector) > > > CFLAGS += $(fno_stack_protector_all) > > > CFLAGS += $(wno_frame_address) > > > +CFLAGS += $(if $(U32_LONG_FMT),-D__U32_LONG_FMT__,) > > > > > > CXXFLAGS += $(CFLAGS) > > > > > > diff --git a/configure b/configure > > > index 995c8fa..127868c 100755 > > > --- a/configure > > > +++ b/configure > > > @@ -109,6 +109,18 @@ if [ -f $testdir/run ]; then > > > ln -fs $testdir/run $testdir-run > > > fi > > > > > > +# check if uint32_t needs a long format modifier > > > +cat << EOF > lib_test.c > > > +#include <inttypes.h> > > > +EOF > > > + > > > +$cross_prefix$cc lib_test.c -E | grep "typedef" | grep "long" | grep "uint32_t" &> /dev/null > > This won't work with cross compilers that don't have inttypes.h in their > path (like mine). How about something like Paolo, I see you merged the above. As I stated in this mail, that doesn't work for my environment, neither arm nor powerpc cross-compile for me now... Please replace with something like I proposed below. We can probably replace the awk with a grep though. Thanks, drew > > cat << EOF > lib_test.c > __UINT32_TYPE__ > EOF > u32_long="`aarch64-linux-gnu-gcc lib_test.c -E | awk '/unsigned/ && $2 == "long"'`" > > Although I feel there should be a compiler macro way to do this without > a need for configure/makefile trickery at all... > > Thanks, > drew > > > > > +exit=$? > > > +if [ $exit -eq 0 ]; then > > > + u32_long=true > > > +fi > > > +rm -f lib_test.c > > > + > > > # check for dependent 32 bit libraries > > > if [ "$arch" != "arm" ]; then > > > cat << EOF > lib_test.c > > > @@ -155,4 +167,5 @@ TEST_DIR=$testdir > > > FIRMWARE=$firmware > > > ENDIAN=$endian > > > PRETTY_PRINT_STACKS=$pretty_print_stacks > > > +U32_LONG_FMT=$u32_long > > > EOF > > > diff --git a/lib/libcflat.h b/lib/libcflat.h > > > index 380395f..e80fc50 100644 > > > --- a/lib/libcflat.h > > > +++ b/lib/libcflat.h > > > @@ -58,12 +58,21 @@ typedef _Bool bool; > > > #define true 1 > > > > > > #if __SIZEOF_LONG__ == 8 > > > +# define __PRI32_PREFIX > > > # define __PRI64_PREFIX "l" > > > # define __PRIPTR_PREFIX "l" > > > #else > > > +#if defined(__U32_LONG_FMT__) > > > +# define __PRI32_PREFIX "l" > > > +#else > > > +# define __PRI32_PREFIX > > > +#endif > > > # define __PRI64_PREFIX "ll" > > > # define __PRIPTR_PREFIX > > > #endif > > > +#define PRId32 __PRI32_PREFIX "d" > > > +#define PRIu32 __PRI32_PREFIX "u" > > > +#define PRIx32 __PRI32_PREFIX "x" > > > #define PRId64 __PRI64_PREFIX "d" > > > #define PRIu64 __PRI64_PREFIX "u" > > > #define PRIx64 __PRI64_PREFIX "x" > > > > > -- > > To unsubscribe from this list: send the line "unsubscribe kvm" in > > the body of a message to majordomo@vger.kernel.org > > More majordomo info at http://vger.kernel.org/majordomo-info.html > -- > To unsubscribe from this list: send the line "unsubscribe kvm" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
diff --git a/Makefile b/Makefile index a32333b..9822d9a 100644 --- a/Makefile +++ b/Makefile @@ -55,6 +55,7 @@ CFLAGS += $(fomit_frame_pointer) CFLAGS += $(fno_stack_protector) CFLAGS += $(fno_stack_protector_all) CFLAGS += $(wno_frame_address) +CFLAGS += $(if $(U32_LONG_FMT),-D__U32_LONG_FMT__,) CXXFLAGS += $(CFLAGS) diff --git a/configure b/configure index 995c8fa..127868c 100755 --- a/configure +++ b/configure @@ -109,6 +109,18 @@ if [ -f $testdir/run ]; then ln -fs $testdir/run $testdir-run fi +# check if uint32_t needs a long format modifier +cat << EOF > lib_test.c +#include <inttypes.h> +EOF + +$cross_prefix$cc lib_test.c -E | grep "typedef" | grep "long" | grep "uint32_t" &> /dev/null +exit=$? +if [ $exit -eq 0 ]; then + u32_long=true +fi +rm -f lib_test.c + # check for dependent 32 bit libraries if [ "$arch" != "arm" ]; then cat << EOF > lib_test.c @@ -155,4 +167,5 @@ TEST_DIR=$testdir FIRMWARE=$firmware ENDIAN=$endian PRETTY_PRINT_STACKS=$pretty_print_stacks +U32_LONG_FMT=$u32_long EOF diff --git a/lib/libcflat.h b/lib/libcflat.h index 380395f..e80fc50 100644 --- a/lib/libcflat.h +++ b/lib/libcflat.h @@ -58,12 +58,21 @@ typedef _Bool bool; #define true 1 #if __SIZEOF_LONG__ == 8 +# define __PRI32_PREFIX # define __PRI64_PREFIX "l" # define __PRIPTR_PREFIX "l" #else +#if defined(__U32_LONG_FMT__) +# define __PRI32_PREFIX "l" +#else +# define __PRI32_PREFIX +#endif # define __PRI64_PREFIX "ll" # define __PRIPTR_PREFIX #endif +#define PRId32 __PRI32_PREFIX "d" +#define PRIu32 __PRI32_PREFIX "u" +#define PRIx32 __PRI32_PREFIX "x" #define PRId64 __PRI64_PREFIX "d" #define PRIu64 __PRI64_PREFIX "u" #define PRIx64 __PRI64_PREFIX "x"
So we can have portable formatting of uint32_t types. However there is a catch. Different compilers can use legally subtly different types though so we need to probe the compiler defined intdef.h first. Signed-off-by: Alex Bennée <alex.bennee@linaro.org> --- Makefile | 1 + configure | 13 +++++++++++++ lib/libcflat.h | 9 +++++++++ 3 files changed, 23 insertions(+)