Bug: https://bugs.gentoo.org/778911
Upstream-PR: https://github.com/yayahjb/cqrlib/pull/1

From 23f422c3049185ad0f24b9f0317b52a21ea771f3 Mon Sep 17 00:00:00 2001
From: orbea <orbea@riseup.net>
Date: Sat, 18 Jun 2022 23:02:44 -0700
Subject: [PATCH] build: Add minimal configure.ac

When building with slibtool using the rlibtool symlink the build will
fail when it fails to find the generated libtool. This file is required
for rlibtool because it is used to determine if building shared or
static.

This will require these commands to build:

  autoreconf -fi
  ./configure
  make

Gentoo Bug: https://bugs.gentoo.org/778911
---
 Makefile => Makefile.in | 29 +++++++++++++----------------
 configure.ac            | 10 ++++++++++
 2 files changed, 23 insertions(+), 16 deletions(-)
 rename Makefile => Makefile.in (97%)
 create mode 100644 configure.ac

diff --git a/Makefile b/Makefile.in
similarity index 97%
rename from Makefile
rename to Makefile.in
index 555e370..fe556ff 100644
--- a/Makefile
+++ b/Makefile.in
@@ -40,41 +40,38 @@
 
 # Version string
 VERSION = 3:0:1
-RELEASE = 1.1.0
-
+RELEASE = @PACKAGE_VERSION@
 
 #
 # Compiler and compilation flags
 #
-CC	= gcc
-CXX = g++
+CC = @CC@
+CXX = @CXX@
 CFLAGS  = -g -O2  -Wall -ansi -pedantic
 CPPFLAGS = $(CFLAGS) -DCQR_NOCCODE=1
 
+# Build directory
+top_builddir = @top_builddir@
+
 #
 # libtool path if system default is not suitable
 #
-#LIBTOOL = $(HOME)/bin/libtool
-ifndef LIBTOOL
-  LIBTOOL = libtool
-endif
+LIBTOOL = @LIBTOOL@
 
 #
 # If local headers must be quoted uncomment the next line
 #
 #USE_LOCAL_HEADERS = 1
 
-
 #
 # Directories
 #
-ROOT     = .
-LIB      = $(ROOT)/lib
-BIN      = $(ROOT)/bin
-SRC      = $(ROOT)
-INC      = $(ROOT)
-EXAMPLES = $(ROOT)
-TESTDATA = $(ROOT)
+LIB      = $(top_builddir)/lib
+BIN      = $(top_builddir)/bin
+SRC      = $(top_builddir)
+INC      = $(top_builddir)
+EXAMPLES = $(top_builddir)
+TESTDATA = $(top_builddir)
 #INSTALLDIR = /usr/local
 INSTALLDIR  = $(HOME)
 
diff --git a/configure.ac b/configure.ac
new file mode 100644
index 0000000..6af5b28
--- /dev/null
+++ b/configure.ac
@@ -0,0 +1,10 @@
+AC_INIT([cqrlib], [1.1.4])
+AC_CONFIG_FILES([Makefile])
+
+LT_INIT
+
+AC_PROG_CXX
+
+AC_SUBST([top_builddir], [$abs_builddir])
+
+AC_OUTPUT