39939cecfa
The m4_ifblank macro is not available on CentOS 6, reverse conditionals to allow use of m4_ifval instead. ./bootstrap.sh was run but this patch does not result in any difference to the generated configure script. Change-Id: I280785deb872ed8d3339d99cce63a2b54d5f1438
28 lines
808 B
Text
28 lines
808 B
Text
# Helper function to check for gcc attributes.
|
|
# AST_GCC_ATTRIBUTE([attribute name], [attribute syntax], [attribute scope], [makeopts flag])
|
|
|
|
AC_DEFUN([AST_GCC_ATTRIBUTE],
|
|
[
|
|
AC_MSG_CHECKING(for compiler 'attribute $1' support)
|
|
saved_CFLAGS="$CFLAGS"
|
|
CFLAGS="$CFLAGS -Wall -Wno-unused -Werror"
|
|
m4_ifval([$4],$4=0)
|
|
ax_cv_have_func_attribute_$1=0
|
|
|
|
AC_COMPILE_IFELSE(
|
|
[AC_LANG_PROGRAM(
|
|
m4_ifval([$2],
|
|
[$3 void __attribute__(($2)) *test(void *muffin, ...) ;],
|
|
[$3 void __attribute__(($1)) *test(void *muffin, ...) {return (void *) 0;}]))],
|
|
AC_MSG_RESULT(yes)
|
|
m4_ifval([$4],$4=1)
|
|
ax_cv_have_func_attribute_$1=1
|
|
AC_DEFINE_UNQUOTED([HAVE_ATTRIBUTE_$1], 1, [Define to 1 if your GCC C compiler supports the '$1' attribute.]),
|
|
AC_MSG_RESULT(no)
|
|
)
|
|
|
|
m4_ifval([$4],[AC_SUBST($4)])
|
|
CFLAGS="$saved_CFLAGS"
|
|
]
|
|
)
|