diff options
Diffstat (limited to 'm4/woe32-dll.m4')
| -rw-r--r-- | m4/woe32-dll.m4 | 32 |
1 files changed, 22 insertions, 10 deletions
diff --git a/m4/woe32-dll.m4 b/m4/woe32-dll.m4 index a25f5acb..8a14c2cd 100644 --- a/m4/woe32-dll.m4 +++ b/m4/woe32-dll.m4 @@ -1,5 +1,5 @@ -# woe32-dll.m4 serial 3 -dnl Copyright (C) 2005-2006, 2011, 2015-2016 Free Software Foundation, Inc. +# woe32-dll.m4 serial 6 +dnl Copyright (C) 2005-2006, 2011, 2018, 2020 Free Software Foundation, Inc. dnl This file is free software; the Free Software Foundation dnl gives unlimited permission to copy and/or distribute it, dnl with or without modifications, as long as this notice is preserved. @@ -25,19 +25,31 @@ dnl From Bruno Haible. # exported struct variable, or to a particular element of an exported # array variable), requiring code modifications. One platform # dictates code modifications on all platforms. -# See <http://www.haible.de/bruno/woe32dll.html> for more details. +# See <https://haible.de/bruno/woe32dll.html> for more details. AC_DEFUN([gl_WOE32_DLL], [ AC_REQUIRE([AC_CANONICAL_HOST]) case "$host_os" in mingw* | cygwin*) - AC_MSG_CHECKING([for auto-import of symbols]) - AC_CACHE_VAL([gl_cv_ld_autoimport], [ - gl_save_LDFLAGS="$LDFLAGS" - LDFLAGS="$LDFLAGS -Wl,--disable-auto-import" - AC_TRY_LINK([], [], [gl_cv_ld_autoimport=yes], [gl_cv_ld_autoimport=no]) - LDFLAGS="$gl_save_LDFLAGS"]) - AC_MSG_RESULT([$gl_cv_ld_autoimport]) + AC_CACHE_CHECK([for auto-import of symbols], + [gl_cv_ld_autoimport], + [dnl --disable-auto-import is unsupported in MSVC and in MSVC/clang. + dnl We need to sort out this case explicitly, because with clang, + dnl -Wl,--disable-auto-import does not yield an error, however later + dnl libtool turns it into --disable-auto-import, which does produce + dnl an error. + AC_EGREP_CPP([Known], [ + #ifdef _MSC_VER + Known + #endif + ], + [gl_cv_ld_autoimport=no], + [gl_save_LDFLAGS="$LDFLAGS" + LDFLAGS="$LDFLAGS -Wl,--disable-auto-import" + AC_LINK_IFELSE([], [gl_cv_ld_autoimport=yes], [gl_cv_ld_autoimport=no]) + LDFLAGS="$gl_save_LDFLAGS" + ]) + ]) if test $gl_cv_ld_autoimport = yes; then LDFLAGS="$LDFLAGS -Wl,--disable-auto-import" fi |