[gcc r13-5141] arm: Don't add crtfastmath.o for -shared

[gcc r13-5141] arm: Don't add crtfastmath.o for -shared

[Richard Biener]

https://gcc.gnu.org/g:426a9f5570d74040176f81e7cf6806b36ebc907f

commit r13-5141-g426a9f5570d74040176f81e7cf6806b36ebc907f
Author: Richard Biener <rguenther@suse.de>
Date:   Fri Jan 13 08:51:10 2023 +0100

    arm: Don't add crtfastmath.o for -shared
    
    Don't add crtfastmath.o for -shared to avoid altering the FP
    environment when loading a shared library.
    
            PR target/55522
            * config/arm/linux-eabi.h (ENDFILE_SPEC): Don't add
            crtfastmath.o for -shared.
            * config/arm/unknown-elf.h (STARTFILE_SPEC): Likewise.

Diff:
---
 gcc/config/arm/linux-eabi.h  | 2 +-
 gcc/config/arm/unknown-elf.h | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/gcc/config/arm/linux-eabi.h b/gcc/config/arm/linux-eabi.h
index 57f830f0176..a119875599d 100644
--- a/gcc/config/arm/linux-eabi.h
+++ b/gcc/config/arm/linux-eabi.h
@@ -121,7 +121,7 @@
 
 #undef	ENDFILE_SPEC
 #define ENDFILE_SPEC \
-  "%{Ofast|ffast-math|funsafe-math-optimizations:crtfastmath.o%s} "	\
+  "%{Ofast|ffast-math|funsafe-math-optimizations:%{!shared:crtfastmath.o%s}} "	\
   LINUX_OR_ANDROID_LD (GNU_USER_TARGET_ENDFILE_SPEC, ANDROID_ENDFILE_SPEC)
 
 /* Use the default LIBGCC_SPEC, not the version in linux-elf.h, as we
diff --git a/gcc/config/arm/unknown-elf.h b/gcc/config/arm/unknown-elf.h
index 464d38b6cc6..397ac3f68b9 100644
--- a/gcc/config/arm/unknown-elf.h
+++ b/gcc/config/arm/unknown-elf.h
@@ -33,7 +33,7 @@
 
 #undef  STARTFILE_SPEC
 #define STARTFILE_SPEC	\
-  "%{Ofast|ffast-math|funsafe-math-optimizations:crtfastmath.o%s} "	\
+  "%{Ofast|ffast-math|funsafe-math-optimizations:%{!shared:crtfastmath.o%s}} "	\
   UNKNOWN_ELF_STARTFILE_SPEC
 
 #define UNKNOWN_ELF_ENDFILE_SPEC	"crtend%O%s crtn%O%s"