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patch 8.0.0434: clang version not correctly detected

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Problem:    Clang version not correctly detected.
Solution:   Adjust the configure script. (Kazunobu Kuriyama)
This commit is contained in:
Bram Moolenaar
2017-03-09 11:58:40 +01:00
parent c3c766ea8c
commit 5f69fee26e
3 changed files with 44 additions and 11 deletions
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20
src/configure.ac
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@@ -67,8 +67,8 @@ dnl clang-500.2.75 or around has abandoned -f[no-]strength-reduce and issues a
dnl warning when that flag is passed to. Accordingly, adjust CFLAGS based on
dnl the version number of the clang in use.
dnl Note that this does not work to get the version of clang 3.1 or 3.2.
AC_MSG_CHECKING(for recent clang version)
CLANG_VERSION_STRING=`$CC --version 2>/dev/null | sed -n -e 's/^.*clang.*\([[0-9]][[0-9]]*\.[[0-9]][[0-9]]*\.[[0-9]][[0-9]]*\).*$/\1/p'`
AC_MSG_CHECKING(for clang version)
CLANG_VERSION_STRING=`$CC --version 2>/dev/null | sed -n -e 's/^.*clang[[^0-9]]*\([[0-9]][[0-9]]*\.[[0-9]][[0-9]]*\.[[0-9]][[0-9]]*\).*$/\1/p'`
if test x"$CLANG_VERSION_STRING" != x"" ; then
CLANG_MAJOR=`echo "$CLANG_VERSION_STRING" | sed -n -e 's/\([[0-9]][[0-9]]*\)\.[[0-9]][[0-9]]*\.[[0-9]][[0-9]]*/\1/p'`
CLANG_MINOR=`echo "$CLANG_VERSION_STRING" | sed -n -e 's/[[0-9]][[0-9]]*\.\([[0-9]][[0-9]]*\)\.[[0-9]][[0-9]]*/\1/p'`
@@ -79,11 +79,15 @@ if test x"$CLANG_VERSION_STRING" != x"" ; then
dnl change the constant 500002075 below appropriately. To get the
dnl integer corresponding to a version number, refer to the
dnl definition of CLANG_VERSION above.
AC_MSG_CHECKING(if clang supports -fno-strength-reduce)
if test "$CLANG_VERSION" -ge 500002075 ; then
CFLAGS=`echo "$CFLAGS" | sed -n -e 's/-fno-strength-reduce/ /p'`
AC_MSG_RESULT(no)
CFLAGS=`echo "$CFLAGS" | sed -e 's/-fno-strength-reduce/ /'`
else
AC_MSG_RESULT(yes)
fi
else
AC_MSG_RESULT(no)
AC_MSG_RESULT(N/A)
fi
dnl If configure thinks we are cross compiling, there might be something
@@ -3016,6 +3020,14 @@ dnl ---------------------------------------------------------------------------
dnl end of GUI-checking
dnl ---------------------------------------------------------------------------
AC_MSG_CHECKING([for /proc/self/exe])
if test -L "/proc/self/exe"; then
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_PROC_SELF_EXE)
else
AC_MSG_RESULT(no)
fi
dnl Check for Cygwin, which needs an extra source file if not using X11
AC_MSG_CHECKING(for CYGWIN or MSYS environment)
case `uname` in