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Autoconf build: Fix the invalid test for '-Wno-deprecated-copy' flag

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(shamelessly stolen from c26db650a1, which was for cmake build)

The original test was always successfull, even if the flag was invalid.

But checking for '-Wdeprecated-copy' instead yields to error if the
warning does not exist. Existent warning for 'deprecated-copy' implies
that 'no-deprecated-copy' also exist.
This commit is contained in:
Jean-Marc Lasgouttes 2021-09-29 18:01:14 +02:00
parent c26db650a1
commit c52049bb83
1 changed files with 2 additions and 2 deletions
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4
config/lyxinclude.m4
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@ -390,8 +390,8 @@ if test x$GXX = xyes; then
dnl Shut off warning -Wdeprecated-copy, which triggers too much
dnl note that g++ always accepts -Wno-xxx, even when -Wxxx is an error.
AC_LANG_PUSH(C++)
AX_CHECK_COMPILE_FLAG([-Wno-deprecated-copy],
[AM_CXXFLAGS="$AM_CXXFLAGS -Wno-deprecated-copy"], [], [-Werror])
AX_CHECK_COMPILE_FLAG([-Wdeprecated-copy],
[AM_CXXFLAGS="$AM_CXXFLAGS -Wno-deprecated-copy"])
AC_LANG_POP(C++)
fi
case $gxx_version in