Add timing scripts

This commit adds timing scripts from
https://github.com/JasonGross/coq-scripts/tree/master/timing into the
tools folder, and integrates them into coq_makefile and Coq's makefile.
The main added makefile targets are:

- the `TIMING` variable - when non-empty, this creates for each built
  `.v` file a `.v.timing` variable (or `.v.before-timing` or
  `.v.after-timing` for `TIMING=before` and `TIMING=after`, respectively)
- `pretty-timed TGTS=...` - runs `make $(TGTS)` and prints a table of
  sorted timings at the end, saving it to `time-of-build-pretty.log`
- `make-pretty-timed-before TGTS=...`, `make-pretty-timed-after
  TGTS=...` - runs `make $(TGTS)`, and saves the timing data to the file
  `time-of-build-before.log` or `time-of-build-after.log`, respectively
- `print-pretty-timed-diff` - prints a table with the difference between
  the logs recorded by `make-pretty-timed-before` and
  `make-pretty-timed-after`, saving the table to
  `time-of-build-both.log`
- `print-pretty-single-time-diff BEFORE=... AFTER=...` - this prints a
  table with the differences between two `.v.timing` files, and saves
  the output to `time-of-build-pretty.log`
- `*.v.timing.diff` - this saves the result of
  `print-pretty-single-time-diff` for each target to the
  `.v.timing.diff` file
- `all.timing.diff` (`world.timing.diff` and `coq.timing.diff` in Coq's
  own Makefile) - makes all `*.v.timing.diff` targets

N.B. We need to make `make pretty-timed` fail if `make` fails.  To do
this, we need to get around the fact that pipes swallow exit codes.
There are a few solutions in
https://stackoverflow.com/questions/23079651/equivalent-of-pipefail-in-gnu-make;
we choose the temporary file rather than requiring the shell of the
makefile to be bash.

1 files changed, 12 insertions, 2 deletions

diff --git a/.gitignore b/.gitignore
index 5340f081d..71de7bb8d 100644
--- a/.gitignore
+++ b/.gitignore
@@ -9,6 +9,7 @@
 *.spot
 *.o
 *.a
+*.pyc
 *.log
 *.aux
 *.dvi
@@ -35,6 +36,10 @@
 *.tacind
 *.v.tex
 *.v.ps
+*.v.timing
+*.v.timing.diff
+*.v.before-timing
+*.v.after-timing
 *.v.html
 *.stamp
 *.native
@@ -55,6 +60,10 @@ plugins/micromega/csdpcert
 plugins/micromega/.micromega.ml.generated
 kernel/byterun/dllcoqrun.so
 coqdoc.sty
+time-of-build.log
+time-of-build-pretty.log
+time-of-build-before.log
+time-of-build-after.log
 .csdp.cache
 test-suite/.lia.cache
 test-suite/.nra.cache
@@ -63,8 +72,9 @@ test-suite/misc/universes/all_stdlib.v
 test-suite/misc/universes/universes.txt
 test-suite/coq-makefile/*/actual
 test-suite/coq-makefile/*/desired
-test-suite/coq-makefile/*/Makefile
-test-suite/coq-makefile/*/Makefile.conf
+test-suite/coq-makefile/**/*.processed
+test-suite/coq-makefile/**/Makefile
+test-suite/coq-makefile/**/Makefile.conf
 test-suite/coq-makefile/*/src
 test-suite/coq-makefile/*/theories
 test-suite/coq-makefile/*/theories2