system/mbootpack: Fix 15.0 build.

Signed-off-by: B. Watson <yalhcru@gmail.com>

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

system/mbootpack/README

@@ -1,8 +1,9 @@
 mbootpack (Multiboot kernel and modules)
 
-This is a tool that takes a multiboot kernel and modules (e.g. a Xen VMM,
-linux kernel and initrd), and packages them up as a single file that looks
-like a bzImage linux kernel. The aim is to allow you to boot multiboot
-kernels (in particular, Xen) using bootloaders that don't support multiboot
-(i.e. pretty much anything except GRUB and SYSLINUX). This is, as you might
-expect, pretty grim stuff, involving lots of lovely 16-bit real-mode code.
+This is a tool that takes a multiboot kernel and modules (e.g. a Xen
+VMM, linux kernel and initrd), and packages them up as a single file
+that looks like a bzImage linux kernel. The aim is to allow you to
+boot multiboot kernels (in particular, Xen) using bootloaders that
+don't support multiboot (i.e. pretty much anything except GRUB and
+SYSLINUX). This is, as you might expect, pretty grim stuff, involving
+lots of lovely 16-bit real-mode code.

system/mbootpack/mbootpack.SlackBuild

@@ -22,6 +22,11 @@
 #  OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
 #  ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
+# 20220210 bkw: Modified by SlackBuilds.org:
+# - BUILD=3.
+# - build with clang (gcc fails *hard*).
+# - only install the actual mbootpack binary in /usr/bin.
+
 cd $(dirname $0) ; CWD=$(pwd)
 
 PRGNAM=mbootpack
@@ -38,9 +43,6 @@ if [ -z "$ARCH" ]; then
   esac
 fi
 
-# If the variable PRINT_PACKAGE_NAME is set, then this script will report what
-# the name of the created package would be, and then exit. This information
-# could be useful to other scripts.
 if [ ! -z "${PRINT_PACKAGE_NAME}" ]; then
   echo "$PRGNAM-$VERSION-$ARCH-$BUILD$TAG.$PKGTYPE"
   exit 0
@@ -75,25 +77,32 @@ cd $PRGNAM-$VERSION
 chown -R root:root .
 find -L . \
  \( -perm 777 -o -perm 775 -o -perm 750 -o -perm 711 -o -perm 555 \
-  -o -perm 511 \) -exec chmod 755 {} \; -o \
+  -o -perm 511 \) -exec chmod 755 {} \+ -o \
  \( -perm 666 -o -perm 664 -o -perm 640 -o -perm 600 -o -perm 444 \
-  -o -perm 440 -o -perm 400 \) -exec chmod 644 {} \;
+  -o -perm 440 -o -perm 400 \) -exec chmod 644 {} \+
 
 # Some fixes from ALT Linux folks
 patch -p1 <$CWD/patches/mbootpack-0.6a-alt3.patch
 
-make
+# 20220210 bkw: actually use SLKCFLAGS.
+sed -i -e "s,-O3,$SLKCFLAGS," Makefile
 
-# We have to do things manually since mbootpack doesn't have make install
-mkdir -p $PKG/usr/{bin,man/man1}
-cp -a bootsect mbootpack mkhex setup $PKG/usr/bin
-cp -a mbootpack.man $PKG/usr/man/man1/mbootpack.1
+# 20220210 bkw: speeds up the sed scripts slightly.
+export LANG=C
 
-find $PKG -print0 | xargs -0 file | grep -e "executable" -e "shared object" | grep ELF \
-  | cut -f 1 -d : | xargs strip --strip-unneeded 2> /dev/null || true
+# 20220210 bkw: gcc fails *badly* at compiling this, and I'm not sure why.
+# We end up with giant (like 130MB) .c source files and gcc either gets
+# OOM-killed or starves everything else of CPU. clang seems fine though.
+# -I- is an error in clang.
+sed -i -e 's,-I-,-iquote,' Makefile
+make CC=clang
 
-find $PKG/usr/man -type f -exec gzip -9 {} \;
-for i in $( find $PKG/usr/man -type l ) ; do ln -s $( readlink $i ).gz $i.gz ; rm $i ; done
+# We have to do things manually since mbootpack doesn't have make install.
+# 20220210 bkw: looking at the ALT linux package, the bootsect, mkhex,
+# setup binaries don't belong in the package.
+mkdir -p $PKG/usr/{bin,man/man1}
+install -s $PRGNAM $PKG/usr/bin
+gzip -9c $PRGNAM.man > $PKG/usr/man/man1/$PRGNAM.1.gz
 
 mkdir -p $PKG/usr/doc/$PRGNAM-$VERSION
 cp -a Changes GPL README $PKG/usr/doc/$PRGNAM-$VERSION