This patch allows us to make the libgcrypt dependency optional (which it
is, if you look at the code), which in turns allows us to build CRDA
without the signature-checking capability on 'regulatory.bin'.

--- crda/Makefile	2015-07-17 11:33:33.546712893 +0200
+++ crda/Makefile	2015-07-17 11:34:05.210994373 +0200
@@ -45,12 +45,14 @@ LDLIBS += `pkg-config --libs openssl`
 $(LIBREG): keys-ssl.c
 
 else
+ifeq ($(USE_GCRYPT),1)
 CFLAGS += -DUSE_GCRYPT
 LDLIBS += -lgcrypt
 
 $(LIBREG): keys-gcrypt.c
 
 endif
+endif
 MKDIR ?= mkdir -p
 INSTALL ?= install
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<tr><td><span title='2017-03-02 18:17:26 +0100'>2017-03-02</span></td><td><a href='/guix/commit/gnu/packages/patches/jacal-fix-texinfo.patch?id=479c4273e6ae899f16da2ebcb36e11baca1af9c8'>gnu: Add jacal.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/maths.scm (jacal): New variable.
* gnu/packages/patches/jacal-fix-texinfo.patch: New file.
</span></span></td><td>John Darrington</td></tr>