Import all system definitions of errno including their string representations, then layer our error definitions on top of that

scripts/generrno.sh

@@ -0,0 +1,16 @@
+#!/bin/bash
+
+srcdir=$1
+rm -f ${srcdir}/src/errno.c
+echo "#include <akerror.h>" >> ${srcdir}/src/errno.c
+echo "#include <errno.h>" >> ${srcdir}/src/errno.c
+echo "void akerr_init_errno(void) {" >> ${srcdir}/src/errno.c
+maxval=$(errno --list | cut -d ' ' -f 2 | sort -g | tail -n 1)
+errno --list | while read LINE; do
+    define=$(echo "$LINE" | cut -d ' ' -f 1);
+    value=$(echo "$LINE" | cut -d ' ' -f 2);
+    desc=$(echo "$LINE" | cut -d ' ' -f 3-);
+    echo "	akerr_name_for_status(${define}, \"${desc}\");" >> ${srcdir}/src/errno.c ;
+done;
+echo "}" >> ${srcdir}/src/errno.c
+sed "s/#define AKERR_LAST_ERRNO_VALUE .*/#define AKERR_LAST_ERRNO_VALUE      ${maxval}/" ${srcdir}/include/akerror.tmpl.h > ${srcdir}/include/akerror.h