Add support for ppc64le v1 PROPOSED

Breno Leitao: 1
 Add support for ppc64le

 1 files changed, 6 insertions(+), 0 deletions(-)

Hi Timo,

On 01/20/2017 10:35 AM, Timo Teras wrote:

Hi Timo,

On 01/20/2017 11:42 AM, Timo Teras wrote:

[alpine-aports] [PATCH] Add support for ppc64le Export this patch

This is a patch that adds support for ppc64le platform.  Currently, musl fails
to build with long double as 128-bits, because POWER does not implement IEEE
long double but IBM long double which causes the following error:

unsupported long double type musl

This patch just turns "long double" into "double" for ppc64le.

Timo Teras <timo.teras@iki.fi>

7 years ago

Should this be in gcc default flags instead? I suspect almost nothing
will work with 128-bit double if c-library does not support it. And
assume this affects ABI too?

Timo Teras <timo.teras@iki.fi>

7 years ago

http://wiki.musl-libc.org/wiki/Supported_Platforms

powerpc (needs gcc built with --enable-secureplt --with-long-double-64,
and -Wl,--secure-plt to link dynamic binaries.)

Breno Leitao <brenohl@br.ibm.com>

7 years ago

I am *not* using enable-secureplt, and I didn't saw any problem. it seems
that I need it, tho. Not sure with it didn't break. I will take a look depeer
at building musl with secure-plt.

Thank you!



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Please add these as default options for gcc. Otherwise the toolchain is
more or less broken. This makes also the musl CFLAGS hack unnecessary.
Please submit the patch for recognizing the CARCH separately.

Thanks,
Timo


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---
 main/musl/APKBUILD | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/main/musl/APKBUILD b/main/musl/APKBUILD
index d2f3a82..2631ebb 100644
--- a/main/musl/APKBUILD
+++ b/main/musl/APKBUILD
@@ -39,6 +39,7 @@ install_sysroot_headers() {
 	case "$CARCH" in
 	aarch64*) ARCH="aarch64" ;;
 	arm*) ARCH="arm" ;;
+	ppc64*) ARCH="powerpc64" ;;
 	x86) ARCH="i386" ;;
 	x86_64) ARCH="x86_64" ;;
 	mips*) ARCH="mips" ;;
@@ -49,6 +50,11 @@ install_sysroot_headers() {
 build() {
 	cd "$builddir"
 
+	# Consider "long double" 64-bits wide on Power
+	if [ $CARCH == "ppc64le" ]; then
+		CFLAGS="$CFLAGS -mlong-double-64"
+	fi
+
 	# provide minimal libssp_nonshared.a so we don't need libssp from gcc
 	${CROSS_COMPILE}gcc $CPPFLAGS $CFLAGS -c "$srcdir"/__stack_chk_fail_local.c -o __stack_chk_fail_local.o || return 1
 	${CROSS_COMPILE}ar r libssp_nonshared.a __stack_chk_fail_local.o || return 1
-- 
2.7.4



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