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Build: Update the comment about -Werror usage in checks.
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1 changed files with 8 additions and 2 deletions
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configure.ac
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configure.ac
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@ -832,8 +832,14 @@ AC_C_BIGENDIAN
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# __attribute__((__constructor__)) can be used for one-time initializations.
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# Use -Werror because some compilers accept unknown attributes and just
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# give a warning. If it works this should give no warnings, even
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# clang -Weverything should be fine.
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# give a warning.
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#
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# FIXME? Unfortunately -Werror can cause trouble if CFLAGS contains options
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# that produce warnings for unrelated reasons. For example, GCC and Clang
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# support -Wunused-macros which will warn about "#define _GNU_SOURCE 1"
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# which will be among the #defines that Autoconf inserts to the beginning of
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# the test program. There seems to be no nice way to prevent Autoconf from
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# inserting the any defines to the test program.
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AC_MSG_CHECKING([if __attribute__((__constructor__)) can be used])
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have_func_attribute_constructor=no
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OLD_CFLAGS="$CFLAGS"
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