system/a2tools: Fix compile warnings.

Signed-off-by: B. Watson <urchlay@slackware.uk>

Signed-off-by: Willy Sudiarto Raharjo <willysr@slackbuilds.org>

system/a2tools/a2tools.SlackBuild

@@ -6,11 +6,13 @@
 
 # Licensed under the WTFPL. See http://www.wtfpl.net/txt/copying/ for details.
 
+# 20230601 bkw: BUILD=2, fix compiler warnings.
+
 cd $(dirname $0) ; CWD=$(pwd)
 
 PRGNAM=a2tools
 VERSION=${VERSION:-003}
-BUILD=${BUILD:-1}
+BUILD=${BUILD:-2}
 TAG=${TAG:-_SBo}
 PKGTYPE=${PKGTYPE:-tgz}
 
@@ -33,16 +35,12 @@ OUTPUT=${OUTPUT:-/tmp}
 
 if [ "$ARCH" = "i586" ]; then
   SLKCFLAGS="-O2 -march=i586 -mtune=i686"
-  LIBDIRSUFFIX=""
 elif [ "$ARCH" = "i686" ]; then
   SLKCFLAGS="-O2 -march=i686 -mtune=i686"
-  LIBDIRSUFFIX=""
 elif [ "$ARCH" = "x86_64" ]; then
   SLKCFLAGS="-O2 -fPIC"
-  LIBDIRSUFFIX="64"
 else
   SLKCFLAGS="-O2"
-  LIBDIRSUFFIX=""
 fi
 
 set -e
@@ -51,16 +49,18 @@ rm -rf $PKG
 mkdir -p $TMP $PKG $OUTPUT
 cd $TMP
 rm -rf $PRGNAM
-unzip $CWD/$PRGNAM-v$VERSION.zip
+unzip $CWD/$PRGNAM-v$VERSION.zip -x '*.exe' '*.dos' '*.csh'
 cd $PRGNAM
 chown -R root:root .
-find -L .  -perm /111 -a \! -perm 755 -a -exec chmod 755 {} \+ -o \
-        \! -perm /111 -a \! -perm 644 -a -exec chmod 644 {} \+
+chmod 644 *
+
+# 20230531 bkw: fix a couple of (probably harmless) compiler warnings.
+patch -p1 < $CWD/fix_warnings.diff
 
 # It doesn't come with a Makefile, it comes with a csh script. Don't
 # use it...
 
-gcc $SLKCFLAGS -DUNIX -Wall -o $PRGNAM $PRGNAM.c
+${CC:-gcc} $SLKCFLAGS -DUNIX -Wall -o $PRGNAM $PRGNAM.c
 mkdir -p $PKG/usr/bin $PKG/usr/man/man6
 install -s -m0755 $PRGNAM $PKG/usr/bin
 gzip -9c < $PRGNAM.6 > $PKG/usr/man/man6/$PRGNAM.6.gz
@@ -70,9 +70,10 @@ for link in a2ls a2in a2out a2rm; do
   ln -s $PRGNAM.6.gz $PKG/usr/man/man6/$link.6.gz
 done
 
-mkdir -p $PKG/usr/doc/$PRGNAM-$VERSION
-cp -a LICENSE README $PKG/usr/doc/$PRGNAM-$VERSION
-cat $CWD/$PRGNAM.SlackBuild > $PKG/usr/doc/$PRGNAM-$VERSION/$PRGNAM.SlackBuild
+PKGDOC=$PKG/usr/doc/$PRGNAM-$VERSION
+mkdir -p $PKGDOC
+cp -a LICENSE README $PKGDOC
+cat $CWD/$PRGNAM.SlackBuild > $PKGDOC/$PRGNAM.SlackBuild
 
 mkdir -p $PKG/install
 cat $CWD/slack-desc > $PKG/install/slack-desc

system/a2tools/fix_warnings.diff

@@ -0,0 +1,21 @@
+diff -Naur a2tools/a2tools.c a2tools.patched/a2tools.c
+--- a2tools/a2tools.c	2001-04-10 00:18:01.000000000 -0400
++++ a2tools.patched/a2tools.c	2023-05-31 23:25:37.538490402 -0400
+@@ -541,7 +541,7 @@
+ void a2out (void) {
+     unsigned char listbuffer[256];
+     unsigned int hop, next_trk, next_sec, i, j;
+-    void (*postproc_function)(void);
++    void (*postproc_function)(void) = NULL;
+     if (!dir_do(dir_find_name)) quit(6,"File not found.\n");
+     hop = begun = 0;
+     next_trk=dir_entry_data[0];
+@@ -817,7 +817,7 @@
+ 
+     /* prepare source filename by padding blanks */
+     i=0;
+-    while(i<30 && a2_name[i]) padded_name[i]=a2_name[i++] & 0x7f;
++    while(i<30 && a2_name[i]) { padded_name[i]=a2_name[i] & 0x7f; i++; }
+     while(i<30) padded_name[i++]=' ';
+ 
+     /* get VTOC and check validity */