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Andres Freund e5555657ba meson: Add support for building with precompiled headers ... This substantially speeds up building for windows, due to the vast amount of headers included via windows.h. A cross build from linux targetting mingw goes from 994.11user 136.43system 0:31.58elapsed 3579%CPU to 422.41user 89.05system 0:14.35elapsed 3562%CPU The wins on windows are similar-ish (but I don't have a system at hand just now for actual numbers). Targetting other operating systems the wins are far smaller (tested linux, macOS, FreeBSD). For now precompiled headers are disabled by default, it's not clear how well they work on all platforms. E.g. on FreeBSD gcc doesn't seem to have working support, but clang does. When doing a full build precompiled headers are only beneficial for targets with multiple .c files, as meson builds a separate precompiled header for each target (so that different compilation options take effect). This commit therefore only changes target with at least two .c files to use precompiled headers. Because this commit adds b_pch=false to the default_options new build directories will have precompiled headers disabled by default, however existing build directories will continue use the default value of b_pch, which is true. Note that using precompiled headers with ccache requires setting CCACHE_SLOPPINESS=pch_defines,time_macros to get hits. Reviewed-by: Peter Eisentraut <peter.eisentraut@enterprisedb.com> Reviewed-by: Justin Pryzby <pryzby@telsasoft.com> Discussion: https://postgr.es/m/CA+hUKG+50eOUbN++ocDc0Qnp9Pvmou23DSXu=ZA6fepOcftKqA@mail.gmail.com Discussion: https://postgr.es/m/c5736f70-bb6d-8d25-e35c-e3d886e4e905@enterprisedb.com Discussion: https://postgr.es/m/20190826054000.GE7005%40paquier.xyz		3 years ago
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.gitignore	Move psql's psqlscan.l into src/fe_utils.	10 years ago
Makefile	windows: Adjust FD_SETSIZE via commandline define	3 years ago
archive.c	Clean up inconsistent use of fflush().	4 years ago
cancel.c	Harmonize more parameter names in bulk.	3 years ago
conditional.c	Allow pgbench to retry in some cases.	4 years ago
connect_utils.c	Remove redundant null pointer checks before free()	4 years ago
mbprint.c	Update copyright for 2022	4 years ago
meson.build	meson: Add support for building with precompiled headers	3 years ago
option_utils.c	Revert 56-bit relfilenode change and follow-up commits.	3 years ago
parallel_slot.c	windows: Adjust FD_SETSIZE via commandline define	3 years ago
print.c	Clean up inconsistent use of fflush().	4 years ago
psqlscan.l	Reject trailing junk after numeric literals	4 years ago
query_utils.c	Remove redundant null pointer checks before PQclear and PQconninfoFree	4 years ago
recovery_gen.c	Improve frontend error logging style.	4 years ago
simple_list.c	Update copyright for 2022	4 years ago
string_utils.c	Fix minor memory leaks in psql's tab completion.	4 years ago