diff options
Diffstat (limited to 'configure.ac')
| -rw-r--r-- | configure.ac | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/configure.ac b/configure.ac index 5b9d837e..d9b16392 100644 --- a/configure.ac +++ b/configure.ac @@ -941,6 +941,36 @@ if test "$gcry_cv_gcc_inline_asm_avx2" = "yes" ; then fi +# +# Check whether GCC assembler supports features needed for our amd64 +# implementations +# +AC_CACHE_CHECK([whether GCC assembler is compatible for amd64 assembly implementations], + [gcry_cv_gcc_amd64_platform_as_ok], + [gcry_cv_gcc_amd64_platform_as_ok=no + AC_COMPILE_IFELSE([AC_LANG_SOURCE( + [[__asm__( + /* Test if '.set' is supported by underlying assembler. */ + ".set a0, %rax\n\t" + ".set b0, %rdx\n\t" + "asmfunc:\n\t" + "movq a0, b0;\n\t" /* Fails here if .set ignored by as. */ + + /* Test if '.type' and '.size' are supported. */ + /* These work only on ELF targets. */ + /* TODO: add COFF (mingw64, cygwin64) support to assembly + * implementations. Mingw64/cygwin64 also require additional + * work because they use different calling convention. */ + ".size asmfunc,.-asmfunc;\n\t" + ".type asmfunc,@function;\n\t" + );]])], + [gcry_cv_gcc_amd64_platform_as_ok=yes])]) +if test "$gcry_cv_gcc_amd64_platform_as_ok" = "yes" ; then + AC_DEFINE(HAVE_COMPATIBLE_GCC_AMD64_PLATFORM_AS,1, + [Defined if underlying assembler is compatible with amd64 assembly implementations]) +fi + + ####################################### #### Checks for library functions. #### ####################################### |