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| author | Victor Stinner <victor.stinner@gmail.com> | 2017-04-21 10:35:24 (GMT) |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2017-04-21 10:35:24 (GMT) |
| commit | 35f3d240ee5f0958034bd500949b08764e36f4dc (patch) | |
| tree | 3779ed8a8ce6d58afdbf3613ff54219840c392f2 | |
| parent | 28205b203a4742c40080b4a2b4b2dcd800716edc (diff) | |
| download | cpython-35f3d240ee5f0958034bd500949b08764e36f4dc.zip cpython-35f3d240ee5f0958034bd500949b08764e36f4dc.tar.gz cpython-35f3d240ee5f0958034bd500949b08764e36f4dc.tar.bz2 | |
bpo-30104: configure now detects when cc is clang (#1233)
Detect when the "cc" compiler (and the $CC variable) is the Clang
compiler. The test is needed to add the -fno-strict-aliasing option
on FreeBSD where cc is clang.
| -rwxr-xr-x | configure | 29 | ||||
| -rw-r--r-- | configure.ac | 29 |
2 files changed, 42 insertions, 16 deletions
@@ -6812,19 +6812,32 @@ then WRAP="-fwrapv" fi - # Clang also needs -fwrapv case $CC in *clang*) - WRAP="-fwrapv" - # bpo-30104: Python/dtoa.c requires to be build with - # -fno-strict-aliasing to fix compiler issue on the - # double/ULong[2] union using clang 4.0 and optimization level - # -O2 or higher - # https://bugs.llvm.org//show_bug.cgi?id=31928 - ALIASING="-fno-strict-aliasing" + cc_is_clang=1 ;; + *) + if $CC --version 2>&1 | grep -q clang + then + cc_is_clang=1 + else + cc_is_clang= + fi esac + if test -n "${cc_is_clang}" + then + # Clang also needs -fwrapv + WRAP="-fwrapv" + + # bpo-30104: Python/dtoa.c requires to be build with + # -fno-strict-aliasing to fix compiler issue on the + # double/ULong[2] union using clang 4.0 and optimization level + # -O2 or higher + # https://bugs.llvm.org//show_bug.cgi?id=31928 + ALIASING="-fno-strict-aliasing" + fi + case $ac_cv_prog_cc_g in yes) if test "$Py_DEBUG" = 'true' ; then diff --git a/configure.ac b/configure.ac index cb79ea8..e5b7257 100644 --- a/configure.ac +++ b/configure.ac @@ -1452,19 +1452,32 @@ then WRAP="-fwrapv" fi - # Clang also needs -fwrapv case $CC in *clang*) - WRAP="-fwrapv" - # bpo-30104: Python/dtoa.c requires to be build with - # -fno-strict-aliasing to fix compiler issue on the - # double/ULong[2] union using clang 4.0 and optimization level - # -O2 or higher - # https://bugs.llvm.org//show_bug.cgi?id=31928 - ALIASING="-fno-strict-aliasing" + cc_is_clang=1 ;; + *) + if $CC --version 2>&1 | grep -q clang + then + cc_is_clang=1 + else + cc_is_clang= + fi esac + if test -n "${cc_is_clang}" + then + # Clang also needs -fwrapv + WRAP="-fwrapv" + + # bpo-30104: Python/dtoa.c requires to be build with + # -fno-strict-aliasing to fix compiler issue on the + # double/ULong[2] union using clang 4.0 and optimization level + # -O2 or higher + # https://bugs.llvm.org//show_bug.cgi?id=31928 + ALIASING="-fno-strict-aliasing" + fi + case $ac_cv_prog_cc_g in yes) if test "$Py_DEBUG" = 'true' ; then |