v1.18 build failure on Linux & macOS about libtexprintf HOT 3 CLOSED

This is a race condition that can be generated repeatedly by running rm src/errorflags.h src/errormessages.h && make -j16

Making all in src
/bin/sh ./gen_errorflags.sh ./boxes.c ./drawbox.c ./lexer.c ./parser.c
/bin/sh ./gen_errorflags.sh ./boxes.c ./drawbox.c ./lexer.c ./parser.c
Collecting error flags from ./boxes.c
Collecting error flags from ./boxes.c
Collecting error flags from ./drawbox.c
Collecting error flags from ./drawbox.c
Collecting error flags from ./lexer.c
Collecting error flags from ./lexer.c
Collecting error flags from ./parser.c
Collecting error flags from ./parser.c
rm: tmperrflags: No such file or directory
make[1]: *** [errormessages.h] Error 1
make: *** [all-recursive] Error 1

The problem is that it's trying to build both src/errorflags.h and src/errormessages.h in parallel, but these are generated by the same script using the same temp file.

A workaround for now is to use a serial build.

from libtexprintf.

The solution to generating multiple source files with a single rule is described in the automake manual: https://www.gnu.org/software/automake/manual/html_node/Multiple-Outputs.html

I'll send a PR shortly.

(It would be good to set up github actions CI as well, to catch these bugs by doing parallel builds from scratch for all PRs.)

from libtexprintf.

Thank you for the quick fix @stevengj!

from libtexprintf.