I was wondering why the (now fixed) c-c++-common/attr-retain-[78].c
failures were showing up in the native results for aarch64-linux-gnu
but not in the posted cross results. It turns out that .init/
.fini_array support is disabled by default for cross builds,
which in turn stops those tests from running.
The test for .init/fini_array support has two parts: one that builds
something with the assembler and linker, and another that compiles
C code and uses preprocessor macros to test the glibc version.
The first test would work with build=host but the second is only
safe for build=target.
However, AArch64 postdates glibc and binutils support for
.init/fini_array by some distance, so it's safe to hard-code the
result to "yes" for cross compilers.
This fixes the only material difference in auto-host.h between
a native and a cross build.
Tested on aarch64-linux-gnu, pushed to trunk.
Richard
gcc/
* acinclude.m4 (gcc_AC_INITFINI_ARRAY): When cross-compiling,
default to yes for aarch64-linux-gnu.
* configure: Regenerate.
---
gcc/acinclude.m4 | 14 ++++++++++++--
gcc/configure | 14 ++++++++++++--
2 files changed, 24 insertions(+), 4 deletions(-)
diff --git a/gcc/acinclude.m4 b/gcc/acinclude.m4
index 74c18241c91..f9f6a07b040 100644
--- a/gcc/acinclude.m4
+++ b/gcc/acinclude.m4
@@ -422,8 +422,18 @@ changequote([,])dnl
])],, [gcc_cv_initfini_array=no]);;
esac
else
- AC_MSG_CHECKING(cross compile... guessing)
- gcc_cv_initfini_array=no
+ case "${target}" in
+ aarch64*-linux-gnu*)
+ # AArch64 postdates glibc support for .init_array/.fini_array,
+ # so we don't need the preprocessor test above.
+ gcc_cv_initfini_array=yes
+ ;;
+
+ *)
+ AC_MSG_CHECKING(cross compile... guessing)
+ gcc_cv_initfini_array=no
+ ;;
+ esac
fi])
enable_initfini_array=$gcc_cv_initfini_array
])
diff --git a/gcc/configure b/gcc/configure
index e8ecb3b0297..33eae5451ad 100755
--- a/gcc/configure
+++ b/gcc/configure
@@ -24132,9 +24132,19 @@ fi
rm -f conftest.err conftest.i conftest.$ac_ext;;
esac
else
- { $as_echo "$as_me:${as_lineno-$LINENO}: checking cross compile...
guessing" >&5
+ case "${target}" in
+ aarch64*-linux-gnu*)
+ # AArch64 postdates glibc support for .init_array/.fini_array,
+ # so we don't need the preprocessor test above.
+ gcc_cv_initfini_array=yes
+ ;;
+
+ *)
+ { $as_echo "$as_me:${as_lineno-$LINENO}: checking cross compile...
guessing" >&5
$as_echo_n "checking cross compile... guessing... " >&6; }
- gcc_cv_initfini_array=no
+ gcc_cv_initfini_array=no
+ ;;
+ esac
fi
fi
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $gcc_cv_initfini_array" >&5
