Blame SOURCES/0001-configure.ac-SV-50648-Detect-Guile-2.2-packages.patch

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From fbf71ec25a5986d9003ac16ee9e23675feac9053 Mon Sep 17 00:00:00 2001
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From: Paul Smith <psmith@gnu.org>
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Date: Sun, 16 Apr 2017 15:03:48 -0400
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Subject: [PATCH] * configure.ac: [SV 50648] Detect Guile 2.2 packages.
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---
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 configure.ac | 26 ++++++++++++++++----------
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 1 file changed, 16 insertions(+), 10 deletions(-)
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diff --git a/configure.ac b/configure.ac
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index 1187ad4..a78fb93 100644
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--- a/configure.ac
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+++ b/configure.ac
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@@ -160,22 +160,28 @@ AC_FUNC_ALLOCA
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 AC_FUNC_CLOSEDIR_VOID
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 # See if the user wants to add (or not) GNU Guile support
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-PKG_PROG_PKG_CONFIG
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 AC_ARG_WITH([guile], [AS_HELP_STRING([--with-guile],
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             [Support GNU Guile for embedded scripting])])
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-# For some strange reason, at least on Ubuntu, each version of Guile
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-# comes with it's own PC file so we have to specify them as individual
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-# packages.  Ugh.
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+# Annoyingly, each version of Guile comes with it's own PC file so we have to
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+# specify them as individual packages.  Ugh.
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+PKG_PROG_PKG_CONFIG
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+
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 AS_IF([test "x$with_guile" != xno],
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-[ PKG_CHECK_MODULES([GUILE], [guile-2.0], [have_guile=yes],
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-  [PKG_CHECK_MODULES([GUILE], [guile-1.8], [have_guile=yes],
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-    [have_guile=no])])
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+[ guile_versions="2.2 2.0 1.8"
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+  guile_version=no
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+  have_guile=no
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+  AC_MSG_CHECKING([for GNU Guile])
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+  for v in $guile_versions; do
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+    PKG_CHECK_EXISTS([guile-$v], [guile_version=$v; have_guile=yes; break], [])
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+  done
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+  AC_MSG_RESULT([$guile_version])
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+  if test "$have_guile" = yes; then
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+    PKG_CHECK_MODULES(GUILE, [guile-$guile_version])
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+    AC_DEFINE([HAVE_GUILE], [1], [Embed GNU Guile support])
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+  fi
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 ])
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-AS_IF([test "$have_guile" = yes],
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-      [AC_DEFINE([HAVE_GUILE], [1], [Embed GNU Guile support])])
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-
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 AM_CONDITIONAL([HAVE_GUILE], [test "$have_guile" = yes])
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 AC_FUNC_GETLOADAVG
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-- 
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2.21.0.rc1
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