I’ve been interested in Redox for a while, and recently had the opportunity to spend some time working with it. Getting the initial Redox build done wasn’t much trouble, and getting started adding/building (simple) recipes that require pure Rust builds was pretty straight-forward. However, quite a few of the applications that I’d be interested in using something other than Rust, often primarily (or at least including) C or C++. As a result, I decided to give it a shot using Redis, as it’s one of the more (the most?) popular key-value stores and is used in a lot of applications. I’ve also successfully done from-source builds for this on Linux already.
I started with Redis 7.0.5 (the current stable release), and then added a bunch of small fixes to deal with compilation errors relating to Redox not having syslog.h or glob.h, per the rust-lang repository’s libc build specs at libc/build.rs at master · rust-lang/libc · GitHub, where Redox’s headers don’t include either one (compared to, say, Linux). Most of these follow something of the following pattern:
#if !defined(__redox__)
// stuff here that Redox compilation doesn't like
#endif
The recipe custom build step is pretty much
rsync -av --delete "${COOKBOOK_SOURCE}/" ./
COOKBOOK_CONFIGURE="make"
COOKBOOK_CONFIGURE_FLAGS=(
CFLAGS="-static"
EXEEXT="-static"
LDFLAGS="-I/usr/local/include"
MALLOC=libc
)
cookbook_configure
where the MALLOC=libc flag is necessary because Redis defaults to using jemalloc, which isn’t available, and of course we otherwise want a static binary for Redox builds since dynamic linking isn’t really supported.
Once that’s done, apart from some warnings, the rest of the source-level compilation seems to run fine. However, I then run into a linker error when trying to link for redis-server, one of the main binaries that’s produced by the build process.
LINK redis-server
/home/chrism/redox/redox/prefix/x86_64-unknown-redox/relibc-install/bin/../lib/gcc/x86_64-unknown-redox/8.2.0/../../../../x86_64-unknown-redox/bin/ld: cannot find -ldl
/home/chrism/redox/redox/prefix/x86_64-unknown-redox/relibc-install/bin/../lib/gcc/x86_64-unknown-redox/8.2.0/../../../../x86_64-unknown-redox/bin/ld: cannot find -lrt
collect2: error: ld returned 1 exit status
make[2]: *** [Makefile:376: redis-server] Error 1
make[2]: Leaving directory '/home/chrism/redox/redox/cookbook/recipes/redis/build/src'
make[1]: *** [Makefile:6: all] Error 2
make[1]: Leaving directory '/home/chrism/redox/redox/cookbook/recipes/redis/build'
redoxer env: exit status: 2
cook - redis - error: failed to build: failed to run "/home/chrism/redox/redox/cookbook/target/release/cookbook_redoxer" "env" "bash" "-ex": exited with status exit status: 1
make: *** [mk/repo.mk:13: build/repo.tag] Error 1
As far as I can tell, these are related to this line in the Makefile
# All the other OSes (notably Linux)
FINAL_LDFLAGS+= -rdynamic
FINAL_LIBS+=-ldl -pthread -lrt
I’ve tried modifying the lines to look something like the following, including setting the static build flag and removing the dl and rt dependencies, but then end up with a bunch of errors related to undefined references to
LINK redis-server
/home/chrism/redox/redox/prefix/x86_64-unknown-redox/relibc-install/bin/../lib/gcc/x86_64-unknown-redox/8.2.0/../../../../x86_64-unknown-redox/bin/ld: debug.o: in function `bugReportStart':
/home/chrism/redox/redox/cookbook/recipes/redis/build/src/debug.c:1118: undefined reference to `serverLogRaw'
/home/chrism/redox/redox/prefix/x86_64-unknown-redox/relibc-install/bin/../lib/gcc/x86_64-unknown-redox/8.2.0/../../../../x86_64-unknown-redox/bin/ld: debug.o: in function `logServerInfo':
/home/chrism/redox/redox/cookbook/recipes/redis/build/src/debug.c:1716: undefined reference to `serverLogRaw'
/home/chrism/redox/redox/prefix/x86_64-unknown-redox/relibc-install/bin/../lib/gcc/x86_64-unknown-redox/8.2.0/../../../../x86_64-unknown-redox/bin/ld: /home/chrism/redox/redox/cookbook/recipes/redis/build/src/debug.c:1722: undefined reference to `serverLogRaw'
/home/chrism/redox/redox/prefix/x86_64-unknown-redox/relibc-install/bin/../lib/gcc/x86_64-unknown-redox/8.2.0/../../../../x86_64-unknown-redox/bin/ld: /home/chrism/redox/redox/cookbook/recipes/redis/build/src/debug.c:1723: undefined reference to `serverLogRaw'
/home/chrism/redox/redox/prefix/x86_64-unknown-redox/relibc-install/bin/../lib/gcc/x86_64-unknown-redox/8.2.0/../../../../x86_64-unknown-redox/bin/ld: /home/chrism/redox/redox/cookbook/recipes/redis/build/src/debug.c:1725: undefined reference to `serverLogRaw'
/home/chrism/redox/redox/prefix/x86_64-unknown-redox/relibc-install/bin/../lib/gcc/x86_64-unknown-redox/8.2.0/../../../../x86_64-unknown-redox/bin/ld: debug.o:/home/chrism/redox/redox/cookbook/recipes/redis/build/src/debug.c:1736: more undefined references to `serverLogRaw' follow
/home/chrism/redox/redox/prefix/x86_64-unknown-redox/relibc-install/bin/../lib/gcc/x86_64-unknown-redox/8.2.0/../../../../x86_64-unknown-redox/bin/ld: server.o: in function `adjustOpenFilesLimit':
/home/chrism/redox/redox/cookbook/recipes/redis/build/src/server.c:2139: undefined reference to `setrlimit'
/home/chrism/redox/redox/prefix/x86_64-unknown-redox/relibc-install/bin/../lib/gcc/x86_64-unknown-redox/8.2.0/../../../../x86_64-unknown-redox/bin/ld: server.o: in function `daemonize':
/home/chrism/redox/redox/cookbook/recipes/redis/build/src/server.c:6101: undefined reference to `setsid'
/home/chrism/redox/redox/prefix/x86_64-unknown-redox/relibc-install/bin/../lib/gcc/x86_64-unknown-redox/8.2.0/../../../../x86_64-unknown-redox/bin/ld: server.o: in function `redisAsciiArt':
/home/chrism/redox/redox/cookbook/recipes/redis/build/src/server.c:6177: undefined reference to `serverLogRaw'
/home/chrism/redox/redox/prefix/x86_64-unknown-redox/relibc-install/bin/../lib/gcc/x86_64-unknown-redox/8.2.0/../../../../x86_64-unknown-redox/bin/ld: server.o: in function `main':
/home/chrism/redox/redox/cookbook/recipes/redis/build/src/server.c:6838: undefined reference to `tzset'
/home/chrism/redox/redox/prefix/x86_64-unknown-redox/relibc-install/bin/../lib/gcc/x86_64-unknown-redox/8.2.0/../../../../x86_64-unknown-redox/bin/ld: config.o: in function `configSetCommand':
/home/chrism/redox/redox/cookbook/recipes/redis/build/src/config.c:928: undefined reference to `serverLogRaw'
/home/chrism/redox/redox/prefix/x86_64-unknown-redox/relibc-install/bin/../lib/gcc/x86_64-unknown-redox/8.2.0/../../../../x86_64-unknown-redox/bin/ld: module.o: in function `moduleLogRaw':
/home/chrism/redox/redox/cookbook/recipes/redis/build/src/module.c:7024: undefined reference to `serverLogRaw'
/home/chrism/redox/redox/prefix/x86_64-unknown-redox/relibc-install/bin/../lib/gcc/x86_64-unknown-redox/8.2.0/../../../../x86_64-unknown-redox/bin/ld: module.o: in function `moduleLoad':
/home/chrism/redox/redox/cookbook/recipes/redis/build/src/module.c:11236: undefined reference to `serverLogRaw'
/home/chrism/redox/redox/prefix/x86_64-unknown-redox/relibc-install/bin/../lib/gcc/x86_64-unknown-redox/8.2.0/../../../../x86_64-unknown-redox/bin/ld: module.o: in function `moduleVerifyConfigFlags':
/home/chrism/redox/redox/cookbook/recipes/redis/build/src/module.c:11459: undefined reference to `serverLogRaw'
/home/chrism/redox/redox/prefix/x86_64-unknown-redox/relibc-install/bin/../lib/gcc/x86_64-unknown-redox/8.2.0/../../../../x86_64-unknown-redox/bin/ld: /home/chrism/redox/redox/cookbook/recipes/redis/build/src/module.c:11451: undefined reference to `serverLogRaw'
/home/chrism/redox/redox/prefix/x86_64-unknown-redox/relibc-install/bin/../lib/gcc/x86_64-unknown-redox/8.2.0/../../../../x86_64-unknown-redox/bin/ld: module.o:/home/chrism/redox/redox/cookbook/recipes/redis/build/src/module.c:11455: more undefined references to `serverLogRaw' follow
collect2: error: ld returned 1 exit status
My understanding is that both libdl and librt are parts of libc, which should default to pulling things from the relibc implementation. I can see that there is an ld_so directory under the relibc directory in the Redox source, but am having a hard time understanding exactly how that works/if it’s supposed to play the role of the linker that libdl would do. I can’t seem to find any references to librt at all; is this something that would need to be implemented from scratch from Redox, in the same way that it appears both pthread and libm needed to be? Thanks for taking a look, and if I can clarify things, just let me know!