forked from Imagelibrary/rtems
d71ab7fdf8
* aclocal/gcc-weak.m4: New (Extracted from cpukit/configure.ac). * configure.ac: Add RTEMS_CHECK_GCC_WEAK.
20 lines
485 B
Plaintext
20 lines
485 B
Plaintext
AC_DEFUN([RTEMS_CHECK_GCC_WEAK],[
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AC_CACHE_CHECK([whether $CC supports function __attribute__((weak))],
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[rtems_cv_cc_attribute_weak],[
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AS_IF([test x"$GCC" = xyes],[
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save_CFLAGS=$CFLAGS
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CFLAGS=-Werror])
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AC_COMPILE_IFELSE([
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AC_LANG_PROGRAM(
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[void myfunc(char c) __attribute__ ((weak));
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void myfunc(char c) {}],
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[])],
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[rtems_cv_cc_attribute_weak=yes],
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[rtems_cv_cc_attribute_weak=no])
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AS_IF([test x"$GCC" = xyes],[
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CFLAGS=$save_CFLAGS])
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])
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])
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