Headers are reused rom the downloaded kernel. ISO image is generated …

…in custom shell script.

This commit is prerequisite for major switch from glibc to musl.

src/experimental/musl-busybox/02_build_kernel.sh

@@ -19,5 +19,8 @@ sed -i "s/.*CONFIG_DEFAULT_HOSTNAME.*/CONFIG_DEFAULT_HOSTNAME=\"minimal\"/" .con
 # http://unix.stackexchange.com/questions/5518/what-is-the-difference-between-the-following-kernel-makefile-terms-vmlinux-vmlinux
 make bzImage -j $(grep ^processor /proc/cpuinfo | wc -l)
 
+# We need the kernel headers later, so we install them now in ./usr (this is not /usr)
+make headers_install -j $(grep ^processor /proc/cpuinfo | wc -l)
+
 cd ../../..
 

src/experimental/musl-busybox/05_prepare_musl.sh

@@ -12,51 +12,19 @@ cd $(ls -d *)
 
 cd musl-installed/bin
 
-unlink musl-ar
+unlink musl-ar 2>/dev/null
 ln -s `which ar` musl-ar
 
-unlink musl-strip
+unlink musl-strip 2>/dev/null
 ln -s `which strip` musl-strip
 
 cd ../include
 
-#
-# Should work with headers from the newly downloaded kernel
-# but it diesn't work. Damn!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
-#
-#unlink linux
-#ln -s $WORK_KERNEL_DIR/include/linux linux
-#
-#unlink mtd
-#ln -s $WORK_KERNEL_DIR/include/linux/mtd mtd
-#
-#unlink asm
-#ln -s $WORK_KERNEL_DIR/include/uapi/asm-generic asm
-#
-#unlink asm-generic
-#ln -s $WORK_KERNEL_DIR/include/uapi/asm-generic asm-generic
-#
-#unlink uapi
-#ln -s $WORK_KERNEL_DIR/include/uapi uapi
-#
-#unlink uapi
-#ln -s $WORK_KERNEL_DIR/include/uapi uapi
-
-unlink linux
-ln -s /usr/include/linux linux
-
-unlink mtd
-ln -s /usr/include/mtd mtd
-
-if [ -d /usr/include/asm ]
-then
-  unlink asm
-  ln -s /usr/include/asm asm
-else
-  unlink asm
-  ln -s /usr/include/asm-generic asm
-fi
-
-unlink asm-generic
-ln -s /usr/include/asm-generic asm-generic
+# Copy all kernel headers to musl's 'include' folder
+cp -rf $WORK_KERNEL_DIR/usr/include/* .
+
+# Make sure some C structs are not defined in kernel headers if thgey are already defined in musl
+sed -i "s/^\#if.__UAPI_DEF_IN6_ADDR$/#if !defined(_NETINET_IN_H) \&\& defined(__UAPI_DEF_IN6_ADDR)/" ./linux/in6.h
+sed -i "s/^\#if.__UAPI_DEF_SOCKADDR_IN6$/#if !defined(_NETINET_IN_H) \&\& defined(__UAPI_DEF_SOCKADDR_IN6)/" ./linux/in6.h
+sed -i "s/^\#if.__UAPI_DEF_IPV6_MREQ$/#if !defined(_NETINET_IN_H) \&\& defined(__UAPI_DEF_IPV6_MREQ)/" ./linux/in6.h
 

src/experimental/musl-busybox/09_pack_rootfs.sh

@@ -8,7 +8,7 @@ rm -f rootfs.cpio.gz
 cd rootfs
 
 # Packs the current folder structure in "cpio.gz" archive.
-find . | cpio -H newc -o | gzip > ../rootfs.cpio.gz
+find . | cpio -R root:root -H newc -o | gzip > ../rootfs.cpio.gz
 
 cd ../..
 

src/experimental/musl-busybox/10_generate_iso.sh

@@ -1,19 +1,53 @@
 #!/bin/sh
 
-rm -f minimal_linux_live.iso
-
 cd work/kernel
 cd $(ls -d *)
+WORK_KERNEL_DIR=$(pwd)
+cd ../../..
 
-# Edit Makefile to look for genisoimage instead of mkisofs. This was added as a
-# workaround for some "Debian" and "Arch Linux" distributions. In general this
-# fix should be harmless. 
-sed -i 's/mkisofs/genisoimage/g' arch/x86/boot/Makefile
+rm -f minimal_linux_live.iso
+rm -rf work/isoimage
 
-# Generate the ISO image with optimization for "parallel jobs" = "number of processors"
-make isoimage FDINITRD=../../rootfs.cpio.gz -j $(grep ^processor /proc/cpuinfo | wc -l)
+# This is the root folder of the ISO image
+mkdir work/isoimage
+cd work/isoimage
 
-cp arch/x86/boot/image.iso ../../../minimal_linux_live.iso
+# Search and copy the files 'isolinux.bin' and 'ldlinux.c32'
+for i in lib lib64 share end ; do
+    if [ -f /usr/$i/syslinux/isolinux.bin ]; then
+        cp /usr/$i/syslinux/isolinux.bin .
+        if [ -f /usr/$i/syslinux/ldlinux.c32 ]; then
+            cp /usr/$i/syslinux/ldlinux.c32 .
+        fi;
+        break;
+    fi;
+    if [ $i = end ]; then exit 1; fi;
+done
 
-cd ../../..
+# Now we copy the kernel
+cp $WORK_KERNEL_DIR/arch/x86/boot/bzImage ./kernel.bz
+
+# Now we copy the root file system
+cp ../rootfs.cpio.gz ./rootfs.gz
+
+# Copy all source files to "/src". Note that the scripts won't work there.
+mkdir src
+cp ../../*.sh src
+cp ../../.config src
+chmod +rx src/*.sh
+chmod +r src/.config
+
+# Create ISOLINUX configuration file
+echo 'default kernel.bz  initrd=rootfs.gz' > ./isolinux.cfg
+
+# Now we generate the ISO image file
+genisoimage -J -r -o ../minimal_linux_live.iso -b isolinux.bin -c boot.cat -no-emul-boot -boot-load-size 4 -boot-info-table ./
+
+# This allows the ISO image to be bootable if it is burned on USB flash drive
+isohybrid ../minimal_linux_live.iso 2>/dev/null || true
+
+# Copy the ISO image to the root project folder
+cp ../minimal_linux_live.iso ../../
+
+cd ../..