1 files changed, 74 insertions, 0 deletions
diff --git a/debian/patches/libphobos-zlib.diff b/debian/patches/libphobos-zlib.diff
new file mode 100644
index 0000000..1aa8282
--- /dev/null
+++ b/debian/patches/libphobos-zlib.diff
@@ -0,0 +1,74 @@
+# 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])
+ ])