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Commite555565

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meson: Add support for building with precompiled headers
This substantially speeds up building for windows, due to the vast amount ofheaders included via windows.h. A cross build from linux targetting mingw goesfrom994.11user 136.43system 0:31.58elapsed 3579%CPUto422.41user 89.05system 0:14.35elapsed 3562%CPUThe wins on windows are similar-ish (but I don't have a system at hand justnow for actual numbers). Targetting other operating systems the wins are farsmaller (tested linux, macOS, FreeBSD).For now precompiled headers are disabled by default, it's not clear how wellthey work on all platforms. E.g. on FreeBSD gcc doesn't seem to have workingsupport, but clang does.When doing a full build precompiled headers are only beneficial for targetswith multiple .c files, as meson builds a separate precompiled header for eachtarget (so that different compilation options take effect). This committherefore only changes target with at least two .c files to use precompiledheaders.Because this commit adds b_pch=false to the default_options new builddirectories will have precompiled headers disabled by default, howeverexisting build directories will continue use the default value of b_pch, whichis true.Note that using precompiled headers with ccache requires settingCCACHE_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.comDiscussion:https://postgr.es/m/c5736f70-bb6d-8d25-e35c-e3d886e4e905@enterprisedb.comDiscussion:https://postgr.es/m/20190826054000.GE7005%40paquier.xyz
1 parente0b0142 commite555565

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32 files changed

+44
-1
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32 files changed

+44
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‎.cirrus.yml‎

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@@ -447,7 +447,7 @@ task:
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# Use /DEBUG:FASTLINK to avoid high memory usage during linking
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configure_script:|
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vcvarsall x64
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meson setup --backend ninja --buildtype debug -Dc_link_args=/DEBUG:FASTLINK -Dcassert=true -Dssl=openssl -Dextra_lib_dirs=c:\openssl\1.1\lib -Dextra_include_dirs=c:\openssl\1.1\include -DTAR=c:/windows/system32/tar.exe -DPG_TEST_EXTRA="%PG_TEST_EXTRA%" build
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meson setup --backend ninja --buildtype debug -Dc_link_args=/DEBUG:FASTLINK -Dcassert=true -Db_pch=true -Dssl=openssl -Dextra_lib_dirs=c:\openssl\1.1\lib -Dextra_include_dirs=c:\openssl\1.1\include -DTAR=c:/windows/system32/tar.exe -DPG_TEST_EXTRA="%PG_TEST_EXTRA%" build
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build_script:|
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vcvarsall x64

‎contrib/bloom/meson.build‎

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bloom=shared_module('bloom',
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bloom_sources,
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c_pch: pch_postgres_h,
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kwargs: contrib_mod_args,
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)
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contrib_targets+= bloom

‎contrib/btree_gist/meson.build‎

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btree_gist=shared_module('btree_gist',
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btree_gist_sources,
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c_pch: pch_postgres_h,
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kwargs: contrib_mod_args,
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)
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contrib_targets+= btree_gist

‎contrib/hstore/meson.build‎

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hstore=shared_module('hstore',
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hstore_sources,
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c_pch: pch_postgres_h,
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kwargs: contrib_mod_args,
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)
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contrib_targets+= hstore

‎contrib/pg_trgm/meson.build‎

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pg_trgm=shared_module('pg_trgm',
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pg_trgm_sources,
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c_pch: pch_postgres_h,
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kwargs: contrib_mod_args,
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)
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contrib_targets+= pg_trgm

‎contrib/pgcrypto/meson.build‎

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pgcrypto=shared_module('pgcrypto',
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pgcrypto_sources,
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link_with: pgcrypto_link_with,
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c_pch: pch_postgres_h,
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kwargs: contrib_mod_args+ {
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'dependencies': [pgcrypto_deps, contrib_mod_args['dependencies']]
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},

‎contrib/pgstattuple/meson.build‎

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pgstattuple=shared_module('pgstattuple',
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pgstattuple_sources,
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c_pch: pch_postgres_h,
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kwargs: contrib_mod_args,
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)
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contrib_targets+= pgstattuple

‎contrib/sepgsql/meson.build‎

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sepgsql=shared_module('sepgsql',
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sepgsql_sources,
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c_pch: pch_postgres_h,
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kwargs: contrib_mod_args+ {
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'dependencies': [selinux, contrib_mod_args['dependencies']],
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}

‎contrib/xml2/meson.build‎

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xml2=shared_module('pgxml',
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xml2_sources,
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c_pch: pch_postgres_h,
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kwargs: contrib_mod_args+ {
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'dependencies': [libxml, libxslt, contrib_mod_args['dependencies']],
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},

‎meson.build‎

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@@ -15,6 +15,7 @@ project('postgresql',
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meson_version:'>=0.54',
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default_options: [
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'warning_level=1',#-Wall equivalent
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'b_pch=false',
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'buildtype=release',
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# For compatibility with the autoconf build, set a default prefix. This
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# works even on windows, where it's a drive-relative path (i.e. when on

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