The ruby MakeMakefile generates a makefile that is suboptimal, which has
CFLAGS like this:

  CFLAGS   = $(CCDLFLAGS) -march=x86-64 -mtune=generic \
    -O2 -pipe -fno-plt -fPIC $(ARCH_FLAG)

This works as long as the user doesn't modify the Makefile.

Certain flags (namely -fPIC) need to be present regardless of what
CFLAGS are specified.

The Makefile should have done this instead:

  CFLAGS = -march=x86-64 -mtune=generic -O2
  override CFLAGS += $(CCDLFLAGS) -pipe -fno-plt -fPIC $(ARCH_FLAG)

Unfortunately they didn't, so we need to workaround their lack of

We can simply add the necessary flags in the parent Makefile so everyone
is happy.

Signed-off-by: Felipe Contreras <>
 bindings/Makefile.local | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/bindings/Makefile.local b/bindings/Makefile.local
index bc960bbc..3672e69f 100644
--- a/bindings/Makefile.local
+++ b/bindings/Makefile.local
@@ -10,7 +10,7 @@ ifeq ($(HAVE_RUBY_DEV),1)
                LIBNOTMUCH="../../lib/$(LINKER_NAME)" \
                NOTMUCH_SRCDIR='$(NOTMUCH_SRCDIR)' \
                $(RUBY) extconf.rb --vendor
-       $(MAKE) -C $(dir)/ruby
+       $(MAKE) -C $(dir)/ruby CFLAGS="$(CFLAGS) -pipe -fno-plt -fPIC"
 python-cffi-bindings: lib/$(LINKER_NAME)
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