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# DP: Build zlib in any case to have a fall back for missing libz multilibs
Index: b/src/libphobos/configure.ac
===================================================================
--- a/src/libphobos/configure.ac
+++ b/src/libphobos/configure.ac
@@ -104,6 +104,7 @@ WITH_LOCAL_DRUNTIME([
DRUNTIME_LIBBACKTRACE_SETUP
DRUNTIME_INSTALL_DIRECTORIES
+dnl fake change to regenerate the configure file
# Add dependencies for libgphobos.spec file
LIBS="$LIBS $LIBADD_DLOPEN"
Index: b/src/libphobos/m4/druntime/libraries.m4
===================================================================
--- a/src/libphobos/m4/druntime/libraries.m4
+++ b/src/libphobos/m4/druntime/libraries.m4
@@ -39,18 +39,44 @@ AC_DEFUN([DRUNTIME_LIBRARIES_ZLIB],
[
AC_ARG_WITH(target-system-zlib,
AS_HELP_STRING([--with-target-system-zlib],
- [use installed libz (default: no)]))
+ [use installed libz (default: no)]),
+ [system_zlib=yes],[system_zlib=no])
- system_zlib=false
- AS_IF([test "x$with_target_system_zlib" = "xyes"], [
- AC_CHECK_LIB([z], [deflate], [
- system_zlib=yes
- ], [
- AC_MSG_ERROR([System zlib not found])])
- ], [
- AC_MSG_CHECKING([for zlib])
- AC_MSG_RESULT([just compiled])
- ])
+ AC_MSG_CHECKING([for system zlib])
+ save_LIBS=$LIBS
+ LIBS="$LIBS -lz"
+ dnl the link test is not good enough for ARM32 multilib detection,
+ dnl first check to link, then to run
+ AC_LANG_PUSH(C)
+ AC_LINK_IFELSE(
+ [AC_LANG_PROGRAM([#include <zlib.h>],[gzopen("none", "rb")])],
+ [
+ AC_RUN_IFELSE([AC_LANG_SOURCE([[
+ #include <zlib.h>
+ int main() {
+ gzFile file = gzopen("none", "rb");
+ return 0;
+ }
+ ]])],
+ [system_zlib_found=yes],
+ [system_zlib_found=no],
+ dnl no system zlib for cross builds ...
+ [system_zlib_found=no]
+ )
+ ],
+ [system_zlib_found=no])
+ LIBS=$save_LIBS
+ if test x$system_zlib = xyes; then
+ if test x$system_zlib_found = xyes; then
+ AC_MSG_RESULT([found])
+ else
+ AC_MSG_RESULT([not found, disabled])
+ system_zlib=no
+ fi
+ else
+ AC_MSG_RESULT([not enabled])
+ fi
+ AC_LANG_POP
AM_CONDITIONAL([DRUNTIME_ZLIB_SYSTEM], [test "$with_target_system_zlib" = yes])
])
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