JS is Mozilla's JavaScript engine written in C. JS78 is taken from Firefox.
This package is known to build and work properly using an LFS-11.0 platform.
Download (HTTP): https://archive.mozilla.org/pub/firefox/releases/78.13.0esr/source/firefox-78.13.0esr.source.tar.xz
Download MD5 sum: 872623fc9f93ea8d3f3290024f0c0925
Download size: 319 MB
Estimated disk space required: 3.0 GB (36 MB installed after removing 34MB static lib)
Estimated build time: 2.4 SBU (on a 4-core machine with parallelism=4)
Autoconf-2.13, ICU-69.1, rustc-1.52.0, and Which-2.21
User Notes: https://wiki.linuxfromscratch.org/blfs/wiki/js78
![[Note]](../images/note.png)
Unlike most other packages in BLFS, the instructions below
require you to untar firefox-78.13.0esr.tar.xz and change into the
firefox-78.13.0 folder.
Extracting the tarball will reset the permissions of the current
directory to 0755 if you have permission to do that. If you do
this in a directory where the sticky bit is set, such as
/tmp it will end with error
messages:
tar: .: Cannot utime: Operation not permitted
tar: .: Cannot change mode to rwxr-xr-t: Operation not permitted
tar: Exiting with failure status due to previous errors
This does finish with non-zero status, but it does NOT mean there is a real problem. Do
not untar as the root user in a
directory where the sticky bit is set - that will unset it.
Install JS by running the following commands:
If you are compiling this package in chroot you must do two
things. First, as the root user,
ensure that /dev/shm is mounted. If
you do not do this, the Python
configury will fail with a traceback report referencing
/usr/lib/pythonN.N/multiprocessing/synchronize.py.
Run:
mountpoint -q /dev/shm || mount -t tmpfs devshm /dev/shm
Second, either as the root user
export the $SHELL environment variable
using export
SHELL=/bin/sh or else prepend SHELL=/bin/sh when running the configure command.
Compiling the C++ code respects $MAKEFLAGS and defaults to 'j1', the rust code will use all processors.
mkdir obj &&
cd obj &&
CC=gcc CXX=g++ \
../js/src/configure --prefix=/usr \
--with-intl-api \
--with-system-zlib \
--with-system-icu \
--disable-jemalloc \
--disable-debug-symbols \
--enable-readline &&
make
To run the JS test suite, issue: make -C js/src check-jstests JSTESTS_EXTRA_ARGS="--timeout 300 --wpt=disabled". It's recommended to redirect the output into a log. Depending on the machine, either ten or fourteen JS tests related to locale and timezone fail, because of an issue with recent versions of ICU-69.1.
To run the JIT test suite, issue: make -C js/src check-jit-test JITTEST_EXTRA_ARGS="--timeout 300". One test may fail.
![[Caution]](../images/caution.png)
An issue in the installation process causes any running program which links to JS78 shared library (for example, GNOME Shell) to crash if JS78 is upgraded or reinstalled. To work around this issue, remove the old version of the JS78 shared library before installation:
rm -fv /usr/lib/libmozjs-78.so
Now, as the root user:
make install && rm -v /usr/lib/libjs_static.ajs && sed -i '/@NSPR_CFLAGS@/d' /usr/bin/js78-config
CC=gcc CXX=g++: Upstream now prefers
clang, override it like other
Mozilla packages in BLFS book.
--with-*: These parameters
allow the build system to use system versions of the above
libraries. These are required for stability.
--enable-readline: This
switch enables Readline support in the JS shell.
--disable-jemalloc: This
switch disables the internal memory allocator used in JS78.
jemalloc is only intended for the Firefox browser environment. For
other applications using JS78, if JS78 uses jemalloc, the
application may crash as items allocated in jemalloc allocator are
freed on system (glibc) allocator.
--disable-debug-symbols:
Don't generate debug symbols since they are very large and most
users won't need it. Remove it if you want to debug JS78.
rm -v /usr/lib/libjs_static.ajs: Remove a large static library which is not used by any BLFS package.
sed -i '/@NSPR_CFLAGS@/d' /usr/bin/js78-config: Prevent js78-config from using buggy CFLAGS.
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