diff --git a/gnu/local.mk b/gnu/local.mk
index d531050254..06f3f3a802 100644
--- a/gnu/local.mk
+++ b/gnu/local.mk
@@ -994,6 +994,7 @@ dist_patch_DATA =						\
   %D%/packages/patches/libevent-2.1-skip-failing-test.patch	\
   %D%/packages/patches/libexif-CVE-2016-6328.patch		\
   %D%/packages/patches/libexif-CVE-2017-7544.patch		\
+  %D%/packages/patches/libgpg-error-gawk-compat.patch		\
   %D%/packages/patches/libgit2-avoid-python.patch		\
   %D%/packages/patches/libgit2-mtime-0.patch			\
   %D%/packages/patches/libgdata-fix-tests.patch			\
diff --git a/gnu/packages/gawk.scm b/gnu/packages/gawk.scm
index 487020ad3b..9b7b93651f 100644
--- a/gnu/packages/gawk.scm
+++ b/gnu/packages/gawk.scm
@@ -30,13 +30,13 @@
 (define-public gawk
   (package
    (name "gawk")
-   (version "4.2.1")
+   (version "5.0.0")
    (source (origin
             (method url-fetch)
             (uri (string-append "mirror://gnu/gawk/gawk-" version
                                 ".tar.xz"))
             (sha256
-             (base32 "0lam2zf3n7ak4pig8w46lhx9hzx50kj2v2yj1616mm26wy2rf4fi"))))
+             (base32 "01j409gharghgf7h0pjzywkimhz2ldrxf85nvf3sv1dl1vnr3w2h"))))
    (build-system gnu-build-system)
    (arguments
     `(#:phases (modify-phases %standard-phases
diff --git a/gnu/packages/gnupg.scm b/gnu/packages/gnupg.scm
index 47fcf5569d..230df101d5 100644
--- a/gnu/packages/gnupg.scm
+++ b/gnu/packages/gnupg.scm
@@ -85,7 +85,16 @@
                           version ".tar.bz2"))
       (sha256
        (base32
-        "0z696dmhfxm2n6pmr8b857wwljq9h633yi99bhbn7h88f91rigds"))))
+        "0z696dmhfxm2n6pmr8b857wwljq9h633yi99bhbn7h88f91rigds"))
+      (patches (search-patches "libgpg-error-gawk-compat.patch"))
+      ;; XXX: Remove this snippet with the gawk patch above.  It avoids having
+      ;; to call autoreconf for the Makefile.am change to take effect.
+      (modules '((guix build utils)))
+      (snippet
+       '(begin
+          (substitute* "src/Makefile.in"
+            (("namespace=errnos") "pkg_namespace=errnos"))
+          #t))))
     (build-system gnu-build-system)
     (home-page "https://gnupg.org")
     (synopsis "Library of error values for GnuPG components")
diff --git a/gnu/packages/patches/libgpg-error-gawk-compat.patch b/gnu/packages/patches/libgpg-error-gawk-compat.patch
new file mode 100644
index 0000000000..85477b0be6
--- /dev/null
+++ b/gnu/packages/patches/libgpg-error-gawk-compat.patch
@@ -0,0 +1,155 @@
+From 7865041c77f4f7005282f10f9b6666b19072fbdf Mon Sep 17 00:00:00 2001
+From: NIIBE Yutaka <gniibe@fsij.org>
+Date: Mon, 15 Apr 2019 15:10:44 +0900
+Subject: [PATCH] awk: Prepare for Gawk 5.0.
+
+* src/Makefile.am: Use pkg_namespace (instead of namespace).
+* src/mkerrnos.awk: Likewise.
+* lang/cl/mkerrcodes.awk: Don't escape # in regexp.
+* src/mkerrcodes.awk, src/mkerrcodes1.awk, src/mkerrcodes2.awk: Ditto.
+
+--
+
+In Gawk 5.0, regexp routines are replaced by Gnulib implementation,
+which only allows escaping specific characters.
+
+GnuPG-bug-id: 4459
+Reported-by: Marius Schamschula
+Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>
+---
+ lang/cl/mkerrcodes.awk |  2 +-
+ src/Makefile.am        |  2 +-
+ src/mkerrcodes.awk     |  2 +-
+ src/mkerrcodes1.awk    |  2 +-
+ src/mkerrcodes2.awk    |  2 +-
+ src/mkerrnos.awk       |  2 +-
+ src/mkstrtable.awk     | 10 +++++-----
+ 7 files changed, 11 insertions(+), 11 deletions(-)
+
+diff --git a/lang/cl/mkerrcodes.awk b/lang/cl/mkerrcodes.awk
+index ae29043..9a1fc18 100644
+--- a/lang/cl/mkerrcodes.awk
++++ b/lang/cl/mkerrcodes.awk
+@@ -122,7 +122,7 @@ header {
+ }
+ 
+ !header {
+-  sub (/\#.+/, "");
++  sub (/#.+/, "");
+   sub (/[ 	]+$/, ""); # Strip trailing space and tab characters.
+ 
+   if (/^$/)
+diff --git a/src/Makefile.am b/src/Makefile.am
+index ce1b882..f2590cb 100644
+--- a/src/Makefile.am
++++ b/src/Makefile.am
+@@ -293,7 +293,7 @@ code-from-errno.h: mkerrcodes$(EXEEXT_FOR_BUILD) Makefile
+ 
+ errnos-sym.h: Makefile mkstrtable.awk errnos.in
+ 	$(AWK) -f $(srcdir)/mkstrtable.awk -v textidx=2 -v nogettext=1 \
+-		-v prefix=GPG_ERR_ -v namespace=errnos_ \
++		-v prefix=GPG_ERR_ -v pkg_namespace=errnos_ \
+ 		$(srcdir)/errnos.in >$@
+ 
+ 
+diff --git a/src/mkerrcodes.awk b/src/mkerrcodes.awk
+index 46d436c..e9c857c 100644
+--- a/src/mkerrcodes.awk
++++ b/src/mkerrcodes.awk
+@@ -85,7 +85,7 @@ header {
+ }
+ 
+ !header {
+-  sub (/\#.+/, "");
++  sub (/#.+/, "");
+   sub (/[ 	]+$/, ""); # Strip trailing space and tab characters.
+ 
+   if (/^$/)
+diff --git a/src/mkerrcodes1.awk b/src/mkerrcodes1.awk
+index a771a73..4578e29 100644
+--- a/src/mkerrcodes1.awk
++++ b/src/mkerrcodes1.awk
+@@ -81,7 +81,7 @@ header {
+ }
+ 
+ !header {
+-  sub (/\#.+/, "");
++  sub (/#.+/, "");
+   sub (/[ 	]+$/, ""); # Strip trailing space and tab characters.
+ 
+   if (/^$/)
+diff --git a/src/mkerrcodes2.awk b/src/mkerrcodes2.awk
+index ea58503..188f7a4 100644
+--- a/src/mkerrcodes2.awk
++++ b/src/mkerrcodes2.awk
+@@ -91,7 +91,7 @@ header {
+ }
+ 
+ !header {
+-  sub (/\#.+/, "");
++  sub (/#.+/, "");
+   sub (/[ 	]+$/, ""); # Strip trailing space and tab characters.
+ 
+   if (/^$/)
+diff --git a/src/mkerrnos.awk b/src/mkerrnos.awk
+index f79df66..15b1aad 100644
+--- a/src/mkerrnos.awk
++++ b/src/mkerrnos.awk
+@@ -83,7 +83,7 @@ header {
+ }
+ 
+ !header {
+-  sub (/\#.+/, "");
++  sub (/#.+/, "");
+   sub (/[ 	]+$/, ""); # Strip trailing space and tab characters.
+ 
+   if (/^$/)
+diff --git a/src/mkstrtable.awk b/src/mkstrtable.awk
+index c9de9c1..285e45f 100644
+--- a/src/mkstrtable.awk
++++ b/src/mkstrtable.awk
+@@ -77,7 +77,7 @@
+ #
+ # The variable prefix can be used to prepend a string to each message.
+ #
+-# The variable namespace can be used to prepend a string to each
++# The variable pkg_namespace can be used to prepend a string to each
+ # variable and macro name.
+ 
+ BEGIN {
+@@ -102,7 +102,7 @@ header {
+       print "/* The purpose of this complex string table is to produce";
+       print "   optimal code with a minimum of relocations.  */";
+       print "";
+-      print "static const char " namespace "msgstr[] = ";
++      print "static const char " pkg_namespace "msgstr[] = ";
+       header = 0;
+     }
+   else
+@@ -110,7 +110,7 @@ header {
+ }
+ 
+ !header {
+-  sub (/\#.+/, "");
++  sub (/#.+/, "");
+   sub (/[ 	]+$/, ""); # Strip trailing space and tab characters.
+ 
+   if (/^$/)
+@@ -150,7 +150,7 @@ END {
+   else
+     print "  gettext_noop (\"" last_msgstr "\");";
+   print "";
+-  print "static const int " namespace "msgidx[] =";
++  print "static const int " pkg_namespace "msgidx[] =";
+   print "  {";
+   for (i = 0; i < coded_msgs; i++)
+     print "    " pos[i] ",";
+@@ -158,7 +158,7 @@ END {
+   print "  };";
+   print "";
+   print "static GPG_ERR_INLINE int";
+-  print namespace "msgidxof (int code)";
++  print pkg_namespace "msgidxof (int code)";
+   print "{";
+   print "  return (0 ? 0";
+