[SCM] PostGIS branch master updated. 3.6.0rc2-384-gda7611d73
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Tue Mar 10 15:59:28 PDT 2026
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- Log -----------------------------------------------------------------
commit da7611d733bd175a55ca9ce02298650bcb1f8123
Author: Darafei Praliaskouski <me at komzpa.net>
Date: Wed Mar 11 02:56:50 2026 +0400
Optimize PostGIS module self-calls under LTO
Detect -fno-semantic-interposition when the compiler supports it and pass it into PostgreSQL extension module builds so LTO can replace same-DSO PLT calls with direct internal calls. Add a NEWS note with the local pgbench ST_Collect benchmark result.
diff --git a/NEWS b/NEWS
index 6d6847db0..bf6108365 100644
--- a/NEWS
+++ b/NEWS
@@ -32,6 +32,12 @@ This version requires GEOS 3.10 or higher
* Bug Fixes *
+ - Build PostgreSQL extension modules with `-fno-semantic-interposition` when
+ available so LTO can optimize same-DSO calls to exported PostGIS
+ entry points directly instead of routing through the module PLT; in
+ a local PostgreSQL 18 `pgbench` microbenchmark over 100k four-point
+ groups this reduced `ST_Collect` aggregate latency by about 4%
+ (Darafei Praliaskouski)
- #5973, Install PostGIS utilities under `pg_config --bindir` by default
and document `pg_config`-derived install paths more accurately
(Darafei Praliaskouski)
diff --git a/configure.ac b/configure.ac
index ce0e97a11..9fad2de51 100644
--- a/configure.ac
+++ b/configure.ac
@@ -81,6 +81,15 @@ dnl
PICFLAGS="$lt_prog_compiler_pic"
AC_SUBST([PICFLAGS])
+dnl
+dnl PostgreSQL extension modules can call exported PostGIS entry points across
+dnl translation units. Disable semantic interposition when supported so the
+dnl compiler can optimize those same-DSO calls directly.
+dnl
+MODULE_CFLAGS=""
+_LT_COMPILER_OPTION([if $compiler supports -fno-semantic-interposition], [_cv_nosemanticinterposition], [-fno-semantic-interposition], [], [MODULE_CFLAGS="$MODULE_CFLAGS -fno-semantic-interposition"], [])
+AC_SUBST([MODULE_CFLAGS])
+
_LT_COMPILER_OPTION([if $compiler supports -fno-math-errno], [_cv_nomatherrno], [-fno-math-errno], [], [CFLAGS="$CFLAGS -fno-math-errno"], [])
_LT_COMPILER_OPTION([if $compiler supports -fno-signed-zeros], [_cv_nosignedzeros], [-fno-signed-zeros], [], [CFLAGS="$CFLAGS -fno-signed-zeros"], [])
_LT_COMPILER_OPTION([if $compiler supports -std=gnu11], [_cv_std], -std=gnu11, [], [CFLAGS="-std=gnu11 $CFLAGS"], [])
diff --git a/extensions/address_standardizer/Makefile.in b/extensions/address_standardizer/Makefile.in
index f4929b010..78158c87b 100644
--- a/extensions/address_standardizer/Makefile.in
+++ b/extensions/address_standardizer/Makefile.in
@@ -53,7 +53,7 @@ sql/$(EXTENSION)_data_us--$(EXTVERSION)next--$(EXTVERSION).sql sql/$(EXTENSION)_
sql/test-init-extensions.sql sql/test-parseaddress.sql sql/test-standardize_address_1.sql sql/test-standardize_address_2.sql sql/test-debug_standardize_address.sql
DOCS = README.address_standardizer
-PG_CPPFLAGS = @CFLAGS@ @CPPFLAGS@ -DPCRE_VERSION=@PCRE_VERSION@
+PG_CPPFLAGS = @CFLAGS@ @MODULE_CFLAGS@ @CPPFLAGS@ -DPCRE_VERSION=@PCRE_VERSION@
SHLIB_LINK = @SHLIB_LINK@ @PCRE_LDFLAGS@
EXTRA_CLEAN = sql/ usps-st-city-name.txt mk-st-regexp mk-city-regex test_main
diff --git a/postgis/Makefile.in b/postgis/Makefile.in
index 03955ba39..e433d51f6 100644
--- a/postgis/Makefile.in
+++ b/postgis/Makefile.in
@@ -145,7 +145,7 @@ OBJS=$(PG_OBJS)
# to an existing liblwgeom.so in the PostgreSQL $libdir supplied by an
# older version of PostGIS, rather than with the static liblwgeom.a
# supplied with newer versions of PostGIS
-PG_CPPFLAGS += -I at top_srcdir@/liblwgeom -I at top_builddir@/liblwgeom @CFLAGS@ -I at top_srcdir@/libpgcommon $(FLATGEOBUF_INCLUDE) $(WAYGU_INCLUDE) $(UTHASH_INCLUDE) @CPPFLAGS@ @PICFLAGS@
+PG_CPPFLAGS += -I at top_srcdir@/liblwgeom -I at top_builddir@/liblwgeom @CFLAGS@ @MODULE_CFLAGS@ -I at top_srcdir@/libpgcommon $(FLATGEOBUF_INCLUDE) $(WAYGU_INCLUDE) $(UTHASH_INCLUDE) @CPPFLAGS@ @PICFLAGS@
SHLIB_LINK_F = $(WAYGU_LIB) $(FLATGEOBUF_LIB) ../libpgcommon/libpgcommon.a ../liblwgeom/.libs/liblwgeom.a @SHLIB_LINK@
# Extra files to remove during 'make clean'
diff --git a/raster/rt_pg/Makefile.in b/raster/rt_pg/Makefile.in
index 7b0627fe9..4cac36116 100644
--- a/raster/rt_pg/Makefile.in
+++ b/raster/rt_pg/Makefile.in
@@ -79,6 +79,7 @@ PG_CPPFLAGS += \
$(LIBLWGEOM_CFLAGS) \
@CPPFLAGS@ \
@CFLAGS@ \
+ @MODULE_CFLAGS@ \
$(LIBGDAL_CFLAGS) \
$(LIBPGCOMMON_CFLAGS) \
$(LIBPROJ_CFLAGS) \
diff --git a/sfcgal/Makefile.in b/sfcgal/Makefile.in
index 61ebe0842..98bec98ad 100644
--- a/sfcgal/Makefile.in
+++ b/sfcgal/Makefile.in
@@ -55,7 +55,7 @@ OBJS = lwgeom_sfcgal.o postgis_sfcgal_legacy.o
# to an existing liblwgeom.so in the PostgreSQL $libdir supplied by an
# older version of PostGIS, rather than with the static liblwgeom.a
# supplied with newer versions of PostGIS
-PG_CPPFLAGS += -I at top_builddir@/liblwgeom -I at top_srcdir@/liblwgeom -I at top_srcdir@/libpgcommon @CFLAGS@ @CPPFLAGS@ @PICFLAGS@
+PG_CPPFLAGS += -I at top_builddir@/liblwgeom -I at top_srcdir@/liblwgeom -I at top_srcdir@/libpgcommon @CFLAGS@ @MODULE_CFLAGS@ @CPPFLAGS@ @PICFLAGS@
SHLIB_LINK_F = @top_builddir@/libpgcommon/libpgcommon.a @top_builddir@/liblwgeom/.libs/liblwgeom.a @SHLIB_LINK@
# Add SFCGAL Flags if defined
diff --git a/topology/Makefile.in b/topology/Makefile.in
index 608f5e76a..24f155599 100644
--- a/topology/Makefile.in
+++ b/topology/Makefile.in
@@ -52,7 +52,7 @@ OBJS = postgis_topology.o
# to an existing liblwgeom.so in the PostgreSQL $libdir supplied by an
# older version of PostGIS, rather than with the static liblwgeom.a
# supplied with newer versions of PostGIS
-PG_CPPFLAGS += -I at top_builddir@/liblwgeom -I at top_srcdir@/liblwgeom -I at top_srcdir@/libpgcommon @CFLAGS@ @CPPFLAGS@ @PICFLAGS@
+PG_CPPFLAGS += -I at top_builddir@/liblwgeom -I at top_srcdir@/liblwgeom -I at top_srcdir@/libpgcommon @CFLAGS@ @MODULE_CFLAGS@ @CPPFLAGS@ @PICFLAGS@
SHLIB_LINK_F = @top_builddir@/libpgcommon/libpgcommon.a @top_builddir@/liblwgeom/.libs/liblwgeom.a @SHLIB_LINK@
# Add SFCGAL Flags if defined
-----------------------------------------------------------------------
Summary of changes:
NEWS | 6 ++++++
configure.ac | 9 +++++++++
extensions/address_standardizer/Makefile.in | 2 +-
postgis/Makefile.in | 2 +-
raster/rt_pg/Makefile.in | 1 +
sfcgal/Makefile.in | 2 +-
topology/Makefile.in | 2 +-
7 files changed, 20 insertions(+), 4 deletions(-)
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