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meson: Add basic PGXS compatibility

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Generate a Makefile.global that's complete enough for PGXS to work for some
extensions. It is likely that this compatibility layer will not suffice for
every extension and not all platforms - we can expand it over time.

This allows extensions to use a single buildsystem across all the supported
postgres versions. Once all supported PG versions support meson, we can remove
the compatibility layer.

Reviewed-by: Peter Eisentraut <peter.eisentraut@enterprisedb.com>
Discussion: https://postgr.es/m/20221005200710.luvw5evhwf6clig6@awork3.anarazel.de
This commit is contained in:
Andres Freund
2022-12-06 18:56:46 -08:00
parent 9db49fc5bf
commit 5bdd0cfb91
6 changed files with 311 additions and 11 deletions
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10
src/include/meson.build
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@ -49,8 +49,14 @@ else
var_cxxflags = ''
endif
var_cppflags = ' '.join(cppflags)
var_cflags_sl = '-fPIC' #FIXME
var_ldflags = ' '.join(ldflags + get_option('c_link_args'))
var_cflags_sl = ' '.join(cc.get_supported_arguments('-fPIC'))
# explicitly add -Wl,--as-needed, normally added by meson, but we want it for
# PGXS compatibility
var_ldflags = ' '.join(
ldflags
+ cc.get_supported_link_arguments('-Wl,--as-needed')
+ get_option('c_link_args')
)
var_ldflags_sl = ''.join(ldflags_sl)
var_ldflags_ex = '' # FIXME
# FIXME - some extensions might directly use symbols from one of libs. If