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52 lines
1.5 KiB
Plaintext
52 lines
1.5 KiB
Plaintext
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# Macro added for some Cygwin-specific support -*- sh -*-
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# @author@: Kayvan Sylvan
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AC_DEFUN(CHECK_WITH_CYGWIN,
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[
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case $host_os in
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cygwin* | mingw* | pw32* )
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if test "$GCC" = yes; then
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# Ensure MSVC-compatible struct packing convention.
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# Depends on GCC version. gcc2 uses -fnative-struct while
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# gcc3 uses -mms-bitfields.
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#
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msnative_struct=''
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AC_MSG_CHECKING([how to get MSVC-compatible struct packing])
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case `$CC --version | sed -e 's,\..*,.,' -e q` in
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2.)
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if $CC -v --help 2>/dev/null | grep fnative-struct > /dev/null; then
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msnative_struct='-fnative-struct'
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fi
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;;
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*)
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if $CC -v --help 2>/dev/null | grep ms-bitfields > /dev/null; then
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msnative_struct='-mms-bitfields'
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fi
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;;
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esac
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if test x"$msnative_struct" = x; then
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AC_MSG_RESULT([no way])
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AC_MSG_WARN([produced libraries might be incompatible with MSVC libs])
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else
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CXXFLAGS="$CXXFLAGS $msnative_struct"
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AC_MSG_RESULT([${msnative_struct}])
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fi
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fi
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# Export all symbols to Win32 DLL using MinGW 2.0 ld.
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WIN32_LD_EXPORT_ALL_SYMBOLS=''
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AC_MSG_CHECKING([whether ld accepts --export-all-symbols])
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if $LD --help 2>&1 | egrep 'export-all-symbols' > /dev/null; then
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WIN32_LD_EXPORT_ALL_SYMBOLS='-Wl,--export-all-symbols'
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AC_MSG_RESULT([yes])
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else
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AC_MSG_RESULT([no])
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fi
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if test x"$WIN32_LD_EXPORT_ALL_SYMBOLS" != x; then
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LDFLAGS="$LDFLAGS $WIN32_LD_EXPORT_ALL_SYMBOLS"
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fi
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;;
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esac
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])
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