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Build: Update the comment about -Werror usage in checks.

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Lasse Collin 2023-09-26 17:24:15 +03:00 committed by Jia Tan
parent f3c32762ae
commit dce95a593e
1 changed files with 8 additions and 2 deletions
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10
configure.ac
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@ -832,8 +832,14 @@ AC_C_BIGENDIAN
# __attribute__((__constructor__)) can be used for one-time initializations.
# Use -Werror because some compilers accept unknown attributes and just
# give a warning. If it works this should give no warnings, even
# clang -Weverything should be fine.
# give a warning.
#
# FIXME? Unfortunately -Werror can cause trouble if CFLAGS contains options
# that produce warnings for unrelated reasons. For example, GCC and Clang
# support -Wunused-macros which will warn about "#define _GNU_SOURCE 1"
# which will be among the #defines that Autoconf inserts to the beginning of
# the test program. There seems to be no nice way to prevent Autoconf from
# inserting the any defines to the test program.
AC_MSG_CHECKING([if __attribute__((__constructor__)) can be used])
have_func_attribute_constructor=no
OLD_CFLAGS="$CFLAGS"