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configure: add check for gcc 4.9.0 up-front

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also sets -std=gnu++11 per wxWidgets requirement
closes bug #1506
This commit is contained in:
Darrell Walisser
2017-02-11 00:38:45 -05:00
parent 7517b2653e
commit ad24fee7dd
3 changed files with 122 additions and 8 deletions
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14
configure.ac
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@@ -236,6 +236,20 @@ dnl Solaris builds, by defining HAVE_ALLOCA_H
AC_CHECK_HEADERS_ONCE(alloca.h)
dnl Enable C++ 11 support. Use gnu++11 on GCC since wxWidgets uses extensions
if test "${ax_cv_c_compiler_vendor}" = "gnu"; then
dnl GCC < 4.9 has known bugs (#1397) and can't be used
AX_GCC_VERSION_ATLEAST(4,9,0,[gcc_ok=yes], [gcc_ok=no])
if test x$gcc_ok = xno; then
AC_MSG_ERROR([Audacity requires at least GCC 4.9])
fi
CXXFLAGS="${CXXFLAGS} --std=gnu++11"
else
CXXFLAGS="${CXXFLAGS} --std=c++11"
fi
dnl --------------------------------------------------------------------------
dnl We would like warnings enabled on the builds, but different compilers need
dnl different options for these. This bit tries to work out what flags we