From 0571c43c1cdbbfbdeaa61150a66b41b1ef77fc1e Mon Sep 17 00:00:00 2001
From: Omar Polo <op@omarpolo.com>
Date: Fri, 26 Feb 2021 19:18:48 +0000
Subject: [PATCH 1/3] avoid strtonum (a GNU AWK extension)

this drops the requirements on strtonum, making the script (AFAIK)
POSIX compliant.  This (ab)uses the fact that `+' will cast its
operator to numbers.

Tested with GNU AWK and "The One True AWK" on OpenBSD.
---
 compare_version.awk | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/compare_version.awk b/compare_version.awk
index 0baf3ee..5fdfa52 100644
--- a/compare_version.awk
+++ b/compare_version.awk
@@ -24,7 +24,7 @@ BEGIN {
 function split_version_number (version, parsed) {
     split(version, parsed, VERSION_SEP);
     for (i in parsed) {
-        parsed[i] = strtonum(parsed[i]);
+        parsed[i] = parsed[i] + 0;
     }
 }
 

From 8d99118dc5b7d86c23a20a9eedc1055badd566d6 Mon Sep 17 00:00:00 2001
From: Omar Polo <op@omarpolo.com>
Date: Fri, 26 Feb 2021 19:19:44 +0000
Subject: [PATCH 2/3] use autoconf' ${AWK} instead of looking for gawk

This also fixes an instance of `awk' that should be ${AWK}
---
 configure.ac | 13 ++++++-------
 1 file changed, 6 insertions(+), 7 deletions(-)

diff --git a/configure.ac b/configure.ac
index f9ecc21..31e2888 100644
--- a/configure.ac
+++ b/configure.ac
@@ -50,11 +50,10 @@ if test "$BASH" = "no" ; then
    exit 1;
 fi
 
-AC_PATH_PROG([GAWK],[gawk],[no])
-
-if test "$GAWK" = "no" ; then
-   AC_MSG_ERROR([Can not find GNU AWK (gawk).])
-   exit 1;
+dnl autoconf has an automatic test for AWK
+if test -z "${AWK}"; then
+   AC_MSG_ERROR([Can not find AWK.])
+   exit 1
 fi
 
 AC_PATH_PROGS([XDG_OPEN],[xdg-open open],[no])
@@ -75,14 +74,14 @@ AC_PROG_MKDIR_P
 
 dnl check sbcl version
 SBCL_MIN_VERSION="1.4.16";
-SBCL_VERSION=`${LISP_COMPILER} --version | ${GAWK} -- '// {print $2}'`
+SBCL_VERSION=`${LISP_COMPILER} --version | ${AWK} -- '// {print $2}'`
 
 CHECK_COMPILER_VERSION_P="yes"
 
 AC_ARG_ENABLE([check-sbcl-version], [AS_HELP_STRING([--disable-check-sbcl-version], [Disable checks for minimum supported SBCL version])], [], [])
 
 if test "$enable_check_sbcl_version" = "yes" || test "$enable_check_sbcl_version" = "" ; then
-   SBCL_VERSION_OK=`echo "$SBCL_VERSION $SBCL_MIN_VERSION" | awk -f compare_version.awk`
+   SBCL_VERSION_OK=`echo "$SBCL_VERSION $SBCL_MIN_VERSION" | ${AWK} -f compare_version.awk`
 
    AC_MSG_CHECKING([if the compiler is too old])
    AC_MSG_NOTICE([To Disable this tests use type './configure --disable-check-sbcl-version.])

From 3292d26067f68a7df054e1553dda044eae645f0a Mon Sep 17 00:00:00 2001
From: Omar Polo <op@omarpolo.com>
Date: Fri, 26 Feb 2021 19:41:05 +0000
Subject: [PATCH 3/3] GNU AWK is no more a requirement

---
 README.org | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/README.org b/README.org
index 6559312..cdc6f26 100644
--- a/README.org
+++ b/README.org
@@ -41,7 +41,7 @@
 
    + to install  the package, including running the  script to install
      lisp libraries (~quick_quicklisp.sh~):
-     - GNU AWK (Gawk);
+     - AWK;
      - BASH shell.
 
    + to run the program: