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| author |   Dima Krasner <dima@dimakrasner.com> | 2019-12-04 14:44:49 (GMT) |
|---|---|---|
| committer | Dima Krasner <dima@dimakrasner.com> | 2019-12-04 14:55:20 (GMT) |
| commit | de0d1dbe023c3df09efbdaf6786c9c30e985ccfb (patch) | |
| tree | 842e406c001485722038239fe813d290756eadbf /scripts | |
| parent | 3f461da11f1f8e9dcfdffef24e1982b5ffd10305 (diff) | |
Resepct CT_TARGET_{C,LD}FLAGS when building musl
I was trying to build static binaries for a range of Broadcom soft-float ARMv7
SoCs and kept getting SIGILL, although I was targeting Cortex A7 (and A5,
later), even on A9 and A15.
I found out that once I add -msoft-float, +mp+sec is to blame:
Attribute Section: aeabi
File Attributes
- Tag_CPU_name: "7VE"
+ Tag_CPU_name: "7"
Tag_CPU_arch: v7
- Tag_CPU_arch_profile: Application
- Tag_ARM_ISA_use: Yes
Tag_THUMB_ISA_use: Thumb-2
Tag_ABI_PCS_wchar_t: 4
Tag_ABI_FP_rounding: Needed
@@ -12,8 +10,5 @@ File Attributes
Tag_ABI_FP_number_model: IEEE 754
Tag_ABI_align_needed: 8-byte
Tag_ABI_enum_size: int
Tag_ABI_optimization_goals: Aggressive Size
Tag_CPU_unaligned_access: v6
- Tag_MPextension_use: Allowed
- Tag_DIV_use: Allowed in v7-A with integer division extension
- Tag_Virtualization_use: TrustZone and Virtualization Extensions
(This is the readelf -A diff, before and after armv7-a+nofp -> armv7+nofp).
I kept getting SIGILL even after building my application with a toolchain built
with the correct CFLAGS and found out that crosstool-ng doesn't pass the host
CFLAGS when building musl, which pollutes my binary with these ARMv7 extensions.
Signed-off-by: Dima Krasner <dima@dimakrasner.com>
Diffstat (limited to 'scripts')
| -rw-r--r-- | scripts/build/libc/musl.sh | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/scripts/build/libc/musl.sh b/scripts/build/libc/musl.sh index 807b3bd..05da1d4 100644 --- a/scripts/build/libc/musl.sh +++ b/scripts/build/libc/musl.sh @@ -98,7 +98,8 @@ musl_backend_once() { # host : same as --target # target : the machine musl runs on CT_DoExecLog CFG \ - CFLAGS="${extra_cflags[*]}" \ + CFLAGS="${CT_TARGET_CFLAGS} ${extra_cflags[*]}" \ + LDFLAGS="${CT_TARGET_LDFLAGS}" \ CROSS_COMPILE="${CT_TARGET}-" \ ${CONFIG_SHELL} \ ${src_dir}/configure \ |