1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
|
# Macro added for some Cygwin-specific support -*- sh -*-
# @author@: Kayvan Sylvan
AC_DEFUN([CHECK_WITH_CYGWIN],
[
case $host_os in
cygwin* | mingw* | pw32* )
if test "$GCC" = yes; then
# Ensure MSVC-compatible struct packing convention.
# Depends on GCC version. gcc2 uses -fnative-struct while
# gcc3 uses -mms-bitfields.
#
msnative_struct=''
AC_MSG_CHECKING([how to get MSVC-compatible struct packing])
case `$CC --version | sed -e 's,\..*,.,' -e q` in
2.)
if $CC -v --help 2>/dev/null | grep fnative-struct > /dev/null; then
msnative_struct='-fnative-struct'
fi
;;
*)
if $CC -v --help 2>/dev/null | grep ms-bitfields > /dev/null; then
msnative_struct='-mms-bitfields'
fi
;;
esac
if test x"$msnative_struct" = x; then
AC_MSG_RESULT([no way])
AC_MSG_WARN([produced libraries might be incompatible with MSVC libs])
else
CXXFLAGS="$CXXFLAGS $msnative_struct"
AC_MSG_RESULT([${msnative_struct}])
fi
fi
# Export all symbols to Win32 DLL using MinGW 2.0 ld.
WIN32_LD_EXPORT_ALL_SYMBOLS=''
AC_MSG_CHECKING([whether ld accepts --export-all-symbols])
if $LD --help 2>&1 | egrep 'export-all-symbols' > /dev/null; then
WIN32_LD_EXPORT_ALL_SYMBOLS='-Wl,--export-all-symbols'
AC_MSG_RESULT([yes])
else
AC_MSG_RESULT([no])
fi
if test x"$WIN32_LD_EXPORT_ALL_SYMBOLS" != x; then
LDFLAGS="$LDFLAGS $WIN32_LD_EXPORT_ALL_SYMBOLS"
fi
;;
esac
])
|