diff options
Diffstat (limited to 'configure.in')
| -rw-r--r-- | configure.in | 121 |
1 files changed, 81 insertions, 40 deletions
diff --git a/configure.in b/configure.in index d9353f51c..486390eaa 100644 --- a/configure.in +++ b/configure.in @@ -550,6 +550,7 @@ CFLAGS="$OLD_CFLAGS" AC_MSG_CHECKING([how to make shared objects]) OLD_CFLAGS="$CFLAGS" compiler_shared_objects="" +compiler_supports_shared_objects="no" if test "$compiler_supports_pic" = "yes" ; then my_shared_test_flags="$CFLAGS -fPIC" fi @@ -566,6 +567,7 @@ AC_LINK_IFELSE( ])], [ compiler_shared_objects="-shared" + compiler_supports_shared_objects="yes" ] ) # BeOS specific @@ -581,72 +583,111 @@ AC_LINK_IFELSE( ])], [ compiler_shared_objects="-nostart" + compiler_supports_shared_objects="yes" ] ) -my_shared_test_flags="" CFLAGS="$OLD_CFLAGS" if test "$compiler_supports_shared_objects" = "no" ; then AC_MSG_RESULT([not supported]) AC_MSG_NOTICE([compiler is unable to generate shared objects, disabled plugins (optional)]) WITH_PLUGINS="no" else - AC_MSG_RESULT([$compiler_shared_objects]) + AC_MSG_RESULT([$compiler_shared_objects $compiler_supports_shared_objects]) SOFLAGS="$SOFLAGS $compiler_shared_objects" AC_SUBST([SOFLAGS]) -# -# shared objects need position independent code; some platforms emit -# it always, others need -fPIC -# -AC_MSG_CHECKING([whether $CC needs -fPIC for shared objects]) -OLD_CFLAGS="$CFLAGS" -CFLAGS="$CFLAGS $SOFLAGS" -WITH_PLUGINS="yes" -AC_LINK_IFELSE( - [AC_LANG_SOURCE([ - int bar = 0; - - int foo(void) - { - return bar; - } - ])], - [ - AC_MSG_RESULT([no]) - CFLAGS="$OLD_CFLAGS" - ], - [ - if test "$compiler_supports_pic" = "yes" ; then - # Verify if -shared really fails due to lack of -fPIC or something else - CFLAGS="$CFLAGS -fPIC" + # + # On certain platforms, undefined references on shared libraries won't be checked + # unless explicitly required with the --no-undefined linker option + # + AC_MSG_CHECKING([whether $CC needs -Wl,--no-undefined to check for undefined references in shared objects]) + OLD_CFLAGS="$CFLAGS" + CFLAGS="$SOFLAGS" + AC_LINK_IFELSE( + [AC_LANG_SOURCE([ + void foo(void) { + foobar(); + } + ])], + [ + CFLAGS="$SOFLAGS -Wl,--no-undefined" AC_LINK_IFELSE( [AC_LANG_SOURCE([ int bar = 0; - int foo(void) - { + int foo(void) { return bar; } ])], [ AC_MSG_RESULT([yes]) - CFLAGS="$OLD_CFLAGS -fPIC" + SOFLAGS="$SOFLAGS -Wl,--no-undefined" ], [ - AC_MSG_RESULT([no, but fails for another reason]) - AC_MSG_ERROR([compiler is unable to compile shared objects for an unhandled reason, please report this with attached config.log... stopping]) + AC_MSG_RESULT([unsupported (undefined references check will be ignored)]) ] ) - else - # Disable compilation of plugins (optional), so 'make all' does not fail - AC_MSG_RESULT([yes, but unsupported]) - AC_MSG_NOTICE([compiler is unable to generate position independent code, disabled plugins (optional)]) - WITH_PLUGINS="no" - fi - ] -) + ], + [ + AC_MSG_RESULT([no]) + ] + ) + CFLAGS="$OLD_CFLAGS" + + # + # shared objects need position independent code; some platforms emit + # it always, others need -fPIC + # + AC_MSG_CHECKING([whether $CC needs -fPIC for shared objects]) + OLD_CFLAGS="$CFLAGS" + CFLAGS="$CFLAGS $SOFLAGS" + WITH_PLUGINS="yes" + AC_LINK_IFELSE( + [AC_LANG_SOURCE([ + int bar = 0; + + int foo(void) + { + return bar; + } + ])], + [ + AC_MSG_RESULT([no]) + CFLAGS="$OLD_CFLAGS" + ], + [ + if test "$compiler_supports_pic" = "yes" ; then + # Verify if -shared really fails due to lack of -fPIC or something else + CFLAGS="$CFLAGS -fPIC" + AC_LINK_IFELSE( + [AC_LANG_SOURCE([ + int bar = 0; + + int foo(void) + { + return bar; + } + ])], + [ + AC_MSG_RESULT([yes]) + CFLAGS="$OLD_CFLAGS -fPIC" + ], + [ + AC_MSG_RESULT([no, but fails for another reason]) + AC_MSG_ERROR([compiler is unable to compile shared objects for an unhandled reason, please report this with attached config.log... stopping]) + ] + ) + else + # Disable compilation of plugins (optional), so 'make all' does not fail + AC_MSG_RESULT([yes, but unsupported]) + AC_MSG_NOTICE([compiler is unable to generate position independent code, disabled plugins (optional)]) + WITH_PLUGINS="no" + fi + ] + ) fi +my_shared_test_flags="" AC_SUBST([WITH_PLUGINS]) |