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configure: Add new _MY_CXX_CHECK_SET. No functional change.

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This commit is contained in:
Wilson Snyder 2017-10-07 15:25:23 -04:00
parent 0ac116bb4e
commit 3261a45ec1
1 changed files with 37 additions and 21 deletions
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32
configure.ac
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@ -106,17 +106,18 @@ AC_TYPE_SIZE_T
# Checks for compiler characteristics.
AC_C_INLINE
AC_DEFUN([_MY_CXX_CHECK_OPT],
[# _MY_CXX_CHECK_OPT(flag) -- Check if compiler supports specific options
AC_DEFUN([_MY_CXX_CHECK_FLAG],
[# _MY_CXX_CHECK_FLAG(flag) -- Check if compiler supports specific options
# Set $_my_result appropriately
ACO_SAVE_CXXFLAGS="$CXXFLAGS"
# -Werror needed otherwise unknown -Wno-div-by-zero won't report problems
CXXFLAGS="$CXXFLAGS $2 -Werror"
AC_MSG_CHECKING([whether $CXX accepts $2])
CXXFLAGS="$CXXFLAGS $1 -Werror"
AC_MSG_CHECKING([whether $CXX accepts $1])
AC_COMPILE_IFELSE(
[AC_LANG_PROGRAM([],[])],
[_my_result=yes
if test -s conftest.err; then
if grep -e "$2" conftest.err >/dev/null; then
if grep -e "$1" conftest.err >/dev/null; then
_my_result=no
fi
fi],
@ -129,16 +130,31 @@ AC_DEFUN([_MY_CXX_CHECK_OPT],
]],[])],
[], # Ignore ok exit
[if test -s conftest.err; then
if grep -e "$2" conftest.err >/dev/null; then
if grep -e "$1" conftest.err >/dev/null; then
_my_result=no
fi
fi])
AC_MSG_RESULT($_my_result)
CXXFLAGS="$ACO_SAVE_CXXFLAGS"
])
AC_DEFUN([_MY_CXX_CHECK_SET],
[# _MY_CXX_CHECK_SET(variable,flag) -- Check if compiler supports specific options
# If it does, set variable to flag
_MY_CXX_CHECK_FLAG($2)
if test "$_my_result" = "yes" ; then
$1="$$1 $2"
fi
CXXFLAGS="$ACO_SAVE_CXXFLAGS"
])# _MY_CXX_CHECK_OPT
])
AC_DEFUN([_MY_CXX_CHECK_OPT],
[# _MY_CXX_CHECK_OPT(flag) -- Check if compiler supports specific options
# If it does, append flag to variable
_MY_CXX_CHECK_FLAG($2)
if test "$_my_result" = "yes" ; then
$1="$$1 $2"
fi
])
# Flags for compiling Verilator internals including parser, and Verilated files
# These turn on extra warnings and are only used with 'configure --enable-ccwarn'