Re: [PATCH 1/9] aarch64: Don't add crtfastmath.o for -shared

Fri, 13 Jan 2023 02:49:45 -0800 



On 13/01/2023 07:59, Richard Biener via Gcc-patches wrote:

Don't add crtfastmath.o for -shared to avoid altering the FP
environment when loading a shared library.

        PR target/55522
        * config/aarch64/aarch64-elf-raw.h (ENDFILE_SPEC): Don't add
        crtfastmath.o for -shared.
        * config/aarch64/aarch64-freebsd.h (GNU_USER_TARGET_MATHFILE_SPEC):
        Likewise.
        * config/aarch64/aarch64-linux.h (GNU_USER_TARGET_MATHFILE_SPEC):
        Likewise.
---
  gcc/config/aarch64/aarch64-elf-raw.h | 2 +-
  gcc/config/aarch64/aarch64-freebsd.h | 2 +-
  gcc/config/aarch64/aarch64-linux.h   | 2 +-
  3 files changed, 3 insertions(+), 3 deletions(-)



OK.

R.


diff --git a/gcc/config/aarch64/aarch64-elf-raw.h 
b/gcc/config/aarch64/aarch64-elf-raw.h
index d4d820a9d54..fa5b4527ea0 100644
--- a/gcc/config/aarch64/aarch64-elf-raw.h
+++ b/gcc/config/aarch64/aarch64-elf-raw.h
@@ -25,7 +25,7 @@
  #define STARTFILE_SPEC " crti%O%s crtbegin%O%s crt0%O%s"
  #define ENDFILE_SPEC \
    " crtend%O%s crtn%O%s " \
-  "%{Ofast|ffast-math|funsafe-math-optimizations:crtfastmath.o%s}"
+  "%{Ofast|ffast-math|funsafe-math-optimizations:%{!shared:crtfastmath.o%s}}"

  
  #ifndef LINK_SPEC

  #define LINK_SPEC "%{h*}                 \
diff --git a/gcc/config/aarch64/aarch64-freebsd.h 
b/gcc/config/aarch64/aarch64-freebsd.h
index 13beb3781b6..2cf9cf6f046 100644
--- a/gcc/config/aarch64/aarch64-freebsd.h
+++ b/gcc/config/aarch64/aarch64-freebsd.h
@@ -50,7 +50,7 @@
  #define LINK_SPEC FBSD_TARGET_LINK_SPEC AARCH64_ERRATA_LINK_SPEC

  
  #define GNU_USER_TARGET_MATHFILE_SPEC \

-  "%{Ofast|ffast-math|funsafe-math-optimizations:crtfastmath.o%s}"
+  "%{Ofast|ffast-math|funsafe-math-optimizations:%{!shared:crtfastmath.o%s}}"

  
  #undef ENDFILE_SPEC

  #define ENDFILE_SPEC \
diff --git a/gcc/config/aarch64/aarch64-linux.h 
b/gcc/config/aarch64/aarch64-linux.h
index 5e4553d79f5..61ed4067fc5 100644
--- a/gcc/config/aarch64/aarch64-linux.h
+++ b/gcc/config/aarch64/aarch64-linux.h
@@ -50,7 +50,7 @@
  #define LINK_SPEC LINUX_TARGET_LINK_SPEC AARCH64_ERRATA_LINK_SPEC

  
  #define GNU_USER_TARGET_MATHFILE_SPEC \

-  "%{Ofast|ffast-math|funsafe-math-optimizations:crtfastmath.o%s}"
+  "%{Ofast|ffast-math|funsafe-math-optimizations:%{!shared:crtfastmath.o%s}}"

  
  #undef ENDFILE_SPEC

  #define ENDFILE_SPEC   \






















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