main/go-boostrap: new aport

This is a more minimal version of the main/go aport. It is only supposed
to be used for bootstrapping go1.5 and to clarify this point it is called
go-bootstrap instead of go1.4.

This package doesn't ship a tools or cross subpackage anymore because
doing so would increase the amount of redundant 'code' in this APKBUILD
and neither tools nor cross compilers are needed for bootstrapping
go1.5.

1 files changed, 98 insertions, 0 deletions

diff --git a/main/go-bootstrap/fix-arm-hackery.patch b/main/go-bootstrap/fix-arm-hackery.patch
new file mode 100644
index 0000000000..f5a447264c
--- /dev/null
+++ b/main/go-bootstrap/fix-arm-hackery.patch
@@ -0,0 +1,98 @@
+--- go/src/cmd/dist/arm.c
++++ go.fixed/src/cmd/dist/arm.c
+@@ -11,8 +11,8 @@
+ 	return "6";
+ }
+ #else
+-static void useVFPv3(void);
+-static void useVFPv1(void);
++void useVFPv3(void);
++void useVFPv1(void);
+ 
+ char *
+ xgetgoarm(void)
+@@ -26,46 +26,6 @@
+ 	else if(xtryexecfunc(useVFPv1))
+ 		return "6";
+ 	return "5";
+-}
+-
+-static void
+-useVFPv3(void)
+-{
+-	// try to run VFPv3-only "vmov.f64 d0, #112" instruction
+-	// we can't use that instruction directly, because we
+-	// might be compiling with a soft-float only toolchain.
+-	//
+-	// some newer toolchains are configured to use thumb
+-	// by default, so we need to do some mode changing magic
+-	// here.
+-	// We can use "bx pc; nop" here, but GNU as(1) insists
+-	// on warning us
+-	// "use of r15 in bx in ARM mode is not really useful"
+-	// so we workaround that by using "bx r0"
+-	__asm__ __volatile__ ("mov r0, pc");
+-	__asm__ __volatile__ ("bx r0");
+-	__asm__ __volatile__ (".word 0xeeb70b00"); // vmov.f64 d0, #112
+-	__asm__ __volatile__ (".word 0xe12fff1e"); // bx lr
+-}
+-
+-static void
+-useVFPv1(void)
+-{
+-	// try to run "vmov.f64 d0, d0" instruction
+-	// we can't use that instruction directly, because we
+-	// might be compiling with a soft-float only toolchain
+-	//
+-	// some newer toolchains are configured to use thumb
+-	// by default, so we need to do some mode changing magic
+-	// here.
+-	// We can use "bx pc; nop" here, but GNU as(1) insists
+-	// on warning us
+-	// "use of r15 in bx in ARM mode is not really useful"
+-	// so we workaround that by using "bx r0"
+-	__asm__ __volatile__ ("mov r0, pc");
+-	__asm__ __volatile__ ("bx r0");
+-	__asm__ __volatile__ (".word 0xeeb00b40"); // vomv.f64 d0, d0
+-	__asm__ __volatile__ (".word 0xe12fff1e"); // bx lr
+ }
+ 
+ #endif
+--- go/src/make.bash
++++ go.fixed/src/make.bash
+@@ -129,7 +132,7 @@
+ if [ -z "$CC" -a -z "$(type -t gcc)" -a -n "$(type -t clang)" ]; then
+ 	export CC=clang CXX=clang++
+ fi
+-${CC:-gcc} $mflag -O2 -Wall -Werror -o cmd/dist/dist -Icmd/dist "$DEFGOROOT" cmd/dist/*.c
++${CC:-gcc} $mflag -O2 -Wall -Werror -o cmd/dist/dist -Icmd/dist "$DEFGOROOT" cmd/dist/*.c cmd/dist/*.S
+ 
+ # -e doesn't propagate out of eval, so check success by hand.
+ eval $(./cmd/dist/dist env -p || echo FAIL=true)
+--- /dev/null	2014-12-09 07:52:31.203329541 -0200
++++ go.fixed/src/cmd/dist/arm.S	2014-12-09 10:29:34.149969243 -0200
+@@ -0,0 +1,24 @@
++#ifdef __ARMEL__
++
++.text
++
++.global useVFPv3
++.hidden useVFPv3
++.type useVFPv3,%function
++useVFPv3:
++	mov r0, pc
++	bx r0
++	.word 0xeeb70b00 // vmov.f64 d0, #112
++	.word 0xe12fff1e // bx lr
++
++
++.global useVFPv1
++.hidden useVFPv1
++.type useVFPv1,%function
++useVFPv1:
++	mov r0, pc
++	bx r0
++	.word 0xeeb00b40 // vomv.f64 d0, d0
++	.word 0xe12fff1e // bx lr
++
++#endif