dnl adds -traditional for gcc if needed
AC_PROG_GCC_TRADITIONAL
+dnl do all checks from now on using the C++ compiler: this saves us a lot of
+dnl problems with various functions which may be available in libc but not
+dnl declared in the header and various pointer conversions which compile with
+dnl the C compiler but not in C++
AC_LANG_PUSH(C++)
dnl C++-compiler checks
CXXFLAGS=${CXXFLAGS:=}
AC_BAKEFILE_PROG_CXX
-AC_LANG_POP
-
dnl ranlib command
dnl defines RANLIB with the appropriate command
AC_PROG_RANLIB
dnl ---------------------------------------------------------------------
dnl (non-OS/2-only piece)
- AC_LANG_PUSH(C++)
-
AC_CACHE_CHECK([for strcasecmp() in string.h], ac_cv_string_strcasecmp, [
AC_TRY_LINK([
#include <string.h>
fi
fi
- AC_LANG_POP
dnl (end of non-OS/2-only piece)
;;
esac
[if -D__STDC_EXT__ is required],
wx_cv_STDC_EXT_required,
[
- AC_LANG_PUSH(C++)
AC_TRY_COMPILE(
[],
[
wx_cv_STDC_EXT_required=no,
wx_cv_STDC_EXT_required=yes
)
- AC_LANG_POP
]
)
if test "x$wx_cv_STDC_EXT_required" = "xyes"; then
dnl check for std::string or std::wstring
if test "$wxUSE_STD_STRING" = "yes" -o "$wxUSE_STL" = "yes"; then
- AC_LANG_PUSH(C++)
-
if test "$wxUSE_UNICODE" = "yes"; then
std_string="std::wstring"
char_type="wchar_t"
]
)
])
-
- AC_LANG_POP
fi
if test "$wxUSE_STD_IOSTREAM" = "yes"; then
- AC_LANG_PUSH(C++)
-
AC_CHECK_TYPES([std::istream, std::ostream],,
[wxUSE_STD_IOSTREAM=no],
[#include <iostream>])
AC_MSG_WARN([No std::iostreams, switching to --disable-std_iostreams])
fi
fi
-
- AC_LANG_POP
fi
if test "$wxUSE_STL" = "yes"; then
- AC_LANG_PUSH(C++)
-
dnl check for basic STL functionality
AC_MSG_CHECKING([for basic STL functionality])
AC_TRY_COMPILE([#include <string>
AC_DEFINE(HAVE_GNU_CXX_HASH_MAP)],
[AC_MSG_RESULT(no)])
])
-
- AC_LANG_POP
fi
dnl ---------------------------------------------------------------------------
fi
fi
+dnl Only add the -lm library if floating point functions cannot be used
+dnl without it. This check is important on cygwin because of the bizarre
+dnl way that they have organized functions into libraries. On cygwin, both
+dnl libc.a and libm.a are symbolic links to a single lib libcygwin.a. This
+dnl means that
+dnl 1) linking with -lm is not necessary, and
+dnl 2) linking with -lm is dangerous if the order of libraries is wrong
+dnl In particular, if you compile any program with -mno-cygwin and link with
+dnl -lm, it will crash instantly when it is run. This happens because the
+dnl linker incorrectly links the Cygwin libm.a (==libcygwin.a), which replaces
+dnl the ___main function instead of allowing it to be defined by
+dnl /usr/lib/mingw/libmingw32.a as it should be.
+dnl
+dnl On MacOS X, this test will find that -lm is unnecessary and leave it out.
+dnl
+dnl Just check a few floating point functions. If they are all found without
+dnl -lm, then we must not need -lm.
+have_cos=0
+have_floor=0
+AC_CHECK_FUNCS(cos, have_cos=1)
+AC_CHECK_FUNCS(floor, have_floor=1)
+AC_MSG_CHECKING(if floating point functions link without -lm)
+if test "$have_cos" = 1 -a "$have_floor" = 1; then
+ AC_MSG_RESULT(yes)
+else
+ AC_MSG_RESULT(no)
+ LIBS="$LIBS -lm"
+ # use different functions to avoid configure caching
+ have_sin=0
+ have_ceil=0
+ AC_CHECK_FUNCS(sin, have_sin=1)
+ AC_CHECK_FUNCS(ceil, have_ceil=1)
+ AC_MSG_CHECKING(if floating point functions link with -lm)
+ if test "$have_sin" = 1 -a "$have_ceil" = 1; then
+ AC_MSG_RESULT(yes)
+ else
+ AC_MSG_RESULT(no)
+ # not sure we should warn the user, crash, etc.
+ fi
+fi
+
dnl ---------------------------------------------------------------------------
dnl Optional libraries
dnl
AC_CACHE_CHECK([if expat.h is valid C++ header],
wx_cv_expat_is_not_broken,
[
- AC_LANG_PUSH(C++)
AC_TRY_COMPILE([#include <expat.h>],[],
wx_cv_expat_is_not_broken=yes,
wx_cv_expat_is_not_broken=no
)
- AC_LANG_POP
]
)
if test "$wx_cv_expat_is_not_broken" = "yes" ; then
dnl check what exactly size_t is on this machine - this is necessary to avoid
dnl ambiguous overloads in several places, notably wx/string.h and wx/array.h
-AC_LANG_PUSH(C++)
AC_CACHE_CHECK([if size_t is unsigned int],
wx_cv_size_t_is_uint,
[
fi
fi
-AC_LANG_POP
-
dnl ---------------------------------------------------------------------------
dnl Checks for structures
dnl ---------------------------------------------------------------------------
AC_MSG_WARN([Wide character support is unavailable])
fi
-dnl *printf() functions sometimes are available in the library but not
-dnl prototyped -- if this is the case, we can't use them from C++ code, but to
-dnl detect this we have to use C++ compiler for testing
-AC_LANG_PUSH(C++)
-
dnl check for vsnprintf() -- a safe version of vsprintf())
dnl
dnl the trouble here is that on some systems (e.g HP-UX 10) this function is
[AC_MSG_RESULT([no])]);
fi
-AC_LANG_POP
-
if test "x$ac_cv_header_fnmatch_h" = "xyes"; then
AC_CHECK_FUNCS(fnmatch)
fi
dnl check for available version of iconv()
-AC_LANG_PUSH(C++)
AM_ICONV
LIBS="$LIBICONV $LIBS"
-AC_LANG_POP
dnl check for POSIX signals if we need them
if test "$wxUSE_ON_FATAL_EXCEPTION" = "yes" -a "$wxUSE_UNIX" = "yes"; then
fi
if test "$wxUSE_ON_FATAL_EXCEPTION" = "yes"; then
- AC_LANG_PUSH(C++)
-
AC_CACHE_CHECK([for sa_handler type], wx_cv_type_sa_handler,
[
AC_TRY_COMPILE([#include <signal.h>],
])
])
- AC_LANG_POP
-
AC_DEFINE_UNQUOTED(wxTYPE_SA_HANDLER, $wx_cv_type_sa_handler)
fi
fi
dnl backtrace() and backtrace_symbols() for wxStackWalker
if test "$wxUSE_STACKWALKER" = "yes" -a "$wxUSE_UNIX" = "yes"; then
- AC_LANG_PUSH(C++)
-
AC_CACHE_CHECK([for backtrace() in <execinfo.h>], wx_cv_func_backtrace,
[
AC_TRY_COMPILE([#include <execinfo.h>],
AC_DEFINE(HAVE_CXA_DEMANGLE)
fi
fi
-
- AC_LANG_POP
fi
if test "$wxUSE_STACKWALKER" = "yes" -a "$USE_WIN32" != "1" -a "$USE_UNIX" != "1"; then
if test "$wx_cv_func_statfs" = "yes"; then
dnl check whether we have its dcelaration too: some systems (AIX 4) lack it
- AC_LANG_PUSH(C++)
AC_CACHE_CHECK(for statfs declaration, wx_cv_func_statfs_decl,
AC_TRY_COMPILE(
[
wx_cv_func_statfs_decl=no
)
)
- AC_LANG_POP
if test "$wx_cv_func_statfs_decl" = "yes"; then
AC_DEFINE(HAVE_STATFS_DECL)
dnl
dnl for this check C++ compiler has to be used as passing incompatible
dnl pointers is just a warning and not an error in C
- AC_LANG_PUSH(C++)
-
AC_CACHE_CHECK(for statvfs argument type, wx_cv_type_statvfs_t,
AC_TRY_COMPILE(
[
)
)
- AC_LANG_POP
-
if test "$wx_cv_type_statvfs_t" != "unknown"; then
AC_DEFINE(HAVE_STATVFS)
fi
dnl check for uname (POSIX) and gethostname (BSD)
AC_CHECK_FUNCS(uname gethostname, break)
-dnl check for MT-safe version of strtok (on DEC Alpha, it's ok for C compiler
-dnl but not for C++ one - hence change language)
-AC_LANG_PUSH(C++)
-
AC_CHECK_FUNCS(strtok_r)
-AC_LANG_POP
-
dnl check for inet_addr and inet_aton (these may live either in libc, or in
dnl libnsl or libresolv or libsocket)
INET_LINK=
dnl for it, so testing for it is temporarily disabled and we are restricted
dnl to gethostbyname_r/gethostbyaddr_r and getservbyname_r
-AC_LANG_PUSH(C++)
dnl AC_CHECK_FUNC(getaddrinfo, AC_DEFINE(HAVE_GETADDRINFO), [
dnl no getaddrinfo, so check for gethostbyname_r and
dnl related functions (taken from python's configure.in)
dnl check to fit this case, if it's really needed. - SN )
dnl ]
dnl )
-AC_LANG_POP
if test "$wxUSE_THREADS" = "yes"; then
AC_DEFINE(wxUSE_THREADS)
if test "$ac_cv_func_strptime" = "yes"; then
AC_CACHE_CHECK([for strptime declaration], wx_cv_func_strptime_decl,
[
- AC_LANG_PUSH(C++)
AC_TRY_COMPILE(
[
#include <time.h>
wx_cv_func_strptime_decl=yes,
wx_cv_func_strptime_decl=no
)
- AC_LANG_POP
]
)
fi
wx_cv_func_gettimeofday_has_2_args,
[
dnl on some _really_ old systems it takes only 1 argument
- AC_LANG_PUSH(C++)
-
AC_TRY_COMPILE(
[
#include <sys/time.h>
]
)
)
- AC_LANG_POP
])
if test "$wx_cv_func_gettimeofday_has_2_args" != "yes"; then
dnl This test needs to be done in C++ mode since gsocket.cpp now
dnl is C++ code and pointer cast that are possible even without
dnl warning in C still fail in C++.
- AC_LANG_PUSH(C++)
AC_CACHE_CHECK([what is the type of the third argument of getsockname],
wx_cv_type_getsockname3,
[
else
AC_DEFINE_UNQUOTED(SOCKOPTLEN_T, $wx_cv_type_getsockopt5)
fi
- AC_LANG_POP
fi
fi
if test "$USE_DARWIN" = 1; then
dnl check for a bug in the headers, some have bad setEventCallout
AC_MSG_CHECKING([headers have declarations needed for joystick support])
- AC_LANG_PUSH(C++)
AC_TRY_COMPILE( [ #include <IOKit/hid/IOHIDLib.h> ],
[ IOHIDQueueInterface *qi = NULL;
IOHIDCallbackFunction cb = NULL;
qi->setEventCallout(NULL, cb, NULL, NULL); ],
[ wxUSE_JOYSTICK=yes ]
)
- AC_LANG_POP
AC_MSG_RESULT($wxUSE_JOYSTICK)
fi
if test "$ac_cv_header_ole2_h" = "yes" ; then
if test "$GCC" = yes ; then
- AC_LANG_PUSH(C++)
-
AC_MSG_CHECKING([if g++ requires -fvtable-thunks])
AC_TRY_COMPILE([#include <windows.h>
#include <ole2.h>],
[AC_MSG_RESULT(no)],
[AC_MSG_RESULT(yes)
WXCONFIG_CXXFLAGS="$WXCONFIG_CXXFLAGS -fvtable-thunks"])
- AC_LANG_POP
LIBS=" -lrpcrt4 -loleaut32 -lole32 -luuid$LIBS"
if test "$wxUSE_OLE" = "yes" ; then
AC_DEFINE(wxUSE_OLE)
dnl Output the makefiles and such from the results found above
dnl ---------------------------------------------------------------------------
-dnl all additional libraries (except wxWidgets itself) we link with
+dnl no more tests from here
+AC_LANG_POP
-dnl note that we always link with -lm except for Mac OS X
-dnl extended.c uses floor() and is always linked in
+dnl all additional libraries (except wxWidgets itself) we link with
if test "$wxUSE_MAC" = 1 ; then
if test "$wxUSE_SOUND" = "yes" || test "$wxUSE_MEDIACTRL" = "yes"; then
LDFLAGS="$LDFLAGS -framework IOKit -framework CoreServices -framework System -framework ApplicationServices"
fi
-dnl FIXME: should this be covered by the conditional above
-dnl given the -lm comment there? Or should that comment (and
-dnl this one) be removed.. [ 7 Nov 2001 ]
-
LIBS="$ZLIB_LINK $POSIX4_LINK $INET_LINK $WCHAR_LINK $DL_LINK $LIBS"
-dnl Only add the -lm library if floating point functions cannot be used
-dnl without it. This check is important on cygwin because of the bizarre
-dnl way that they have organized functions into libraries. On cygwin, both
-dnl libc.a and libm.a are symbolic links to a single lib libcygwin.a. This
-dnl means that
-dnl 1) linking with -lm is not necessary, and
-dnl 2) linking with -lm is dangerous if the order of libraries is wrong
-dnl In particular, if you compile any program with -mno-cygwin and link with
-dnl -lm, it will crash instantly when it is run. This happens because the
-dnl linker incorrectly links the Cygwin libm.a (==libcygwin.a), which replaces
-dnl the ___main function instead of allowing it to be defined by
-dnl /usr/lib/mingw/libmingw32.a as it should be.
-dnl
-dnl On MacOS X, this test will find that -lm is unnecessary and leave it out.
-dnl
-dnl Just check a few floating point functions. If they are all found without
-dnl -lm, then we must not need -lm.
-have_cos=0
-have_floor=0
-AC_CHECK_FUNCS(cos, have_cos=1)
-AC_CHECK_FUNCS(floor, have_floor=1)
-AC_MSG_CHECKING(if floating point functions link without -lm)
-if test "$have_cos" = 1 -a "$have_floor" = 1; then
- AC_MSG_RESULT(yes)
-else
- AC_MSG_RESULT(no)
- LIBS="$LIBS -lm"
- # use different functions to avoid configure caching
- have_sin=0
- have_ceil=0
- AC_CHECK_FUNCS(sin, have_sin=1)
- AC_CHECK_FUNCS(ceil, have_ceil=1)
- AC_MSG_CHECKING(if floating point functions link with -lm)
- if test "$have_sin" = 1 -a "$have_ceil" = 1; then
- AC_MSG_RESULT(yes)
- else
- AC_MSG_RESULT(no)
- # not sure we should warn the user, crash, etc.
- fi
-fi
-
if test "$wxUSE_GUI" = "yes"; then
dnl TODO add checks that these samples will really compile (i.e. all the
projects / wxWidgets.git / commitdiff
