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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.
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configure
vendored
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configure
vendored
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@ -6812,19 +6812,32 @@ then
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WRAP="-fwrapv"
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fi
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# Clang also needs -fwrapv
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case $CC in
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*clang*)
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WRAP="-fwrapv"
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# bpo-30104: Python/dtoa.c requires to be build with
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# -fno-strict-aliasing to fix compiler issue on the
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# double/ULong[2] union using clang 4.0 and optimization level
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# -O2 or higher
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# https://bugs.llvm.org//show_bug.cgi?id=31928
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ALIASING="-fno-strict-aliasing"
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cc_is_clang=1
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;;
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*)
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if $CC --version 2>&1 | grep -q clang
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then
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cc_is_clang=1
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else
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cc_is_clang=
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fi
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esac
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if test -n "${cc_is_clang}"
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then
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# Clang also needs -fwrapv
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WRAP="-fwrapv"
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# bpo-30104: Python/dtoa.c requires to be build with
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# -fno-strict-aliasing to fix compiler issue on the
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# double/ULong[2] union using clang 4.0 and optimization level
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# -O2 or higher
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# https://bugs.llvm.org//show_bug.cgi?id=31928
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ALIASING="-fno-strict-aliasing"
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fi
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case $ac_cv_prog_cc_g in
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yes)
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if test "$Py_DEBUG" = 'true' ; then
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29
configure.ac
29
configure.ac
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@ -1452,19 +1452,32 @@ then
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WRAP="-fwrapv"
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fi
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# Clang also needs -fwrapv
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case $CC in
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*clang*)
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WRAP="-fwrapv"
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# bpo-30104: Python/dtoa.c requires to be build with
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# -fno-strict-aliasing to fix compiler issue on the
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# double/ULong[2] union using clang 4.0 and optimization level
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# -O2 or higher
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# https://bugs.llvm.org//show_bug.cgi?id=31928
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ALIASING="-fno-strict-aliasing"
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cc_is_clang=1
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;;
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*)
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if $CC --version 2>&1 | grep -q clang
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then
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cc_is_clang=1
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else
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cc_is_clang=
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fi
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esac
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if test -n "${cc_is_clang}"
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then
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# Clang also needs -fwrapv
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WRAP="-fwrapv"
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# bpo-30104: Python/dtoa.c requires to be build with
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# -fno-strict-aliasing to fix compiler issue on the
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# double/ULong[2] union using clang 4.0 and optimization level
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# -O2 or higher
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# https://bugs.llvm.org//show_bug.cgi?id=31928
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ALIASING="-fno-strict-aliasing"
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fi
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case $ac_cv_prog_cc_g in
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yes)
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if test "$Py_DEBUG" = 'true' ; then
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