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Merged
estebanzimanyi merged 1 commit into from
Aug 15, 2026
Merged

Ask pkg-config where MEOS is and which families it has #13

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29 changes: 19 additions & 10 deletions functions/cgo.go
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Original file line number Diff line number Diff line change
@@ -1,17 +1,26 @@
package functions

/*
// Every optional MEOS family is enabled so the ``#if <FAMILY>``-guarded
// declarations in the core headers (e.g. meos_initialize_pointcloud) are
// visible -- matching the all-families libmeos the catalog is derived from, in
// sync with MobilityDB CMakeLists.txt's ``if(ALL)`` loop (alphabetical). The
// families expose external library types (H3's h3api.h) through their own
// headers, so their include dirs are added too.
#cgo darwin CFLAGS: -I/opt/homebrew/include -I/opt/homebrew/include/h3 -DMEOS=1 -DCBUFFER=1 -DH3=1 -DJSON=1 -DNPOINT=1 -DPOINTCLOUD=1 -DPOSE=1 -DQUADBIN=1 -DRASTER=1 -DRGEO=1
#cgo darwin LDFLAGS: -L/opt/homebrew/lib -lmeos -Wl,-rpath,/opt/homebrew/lib
// The installed libmeos describes itself: `pkg-config --cflags meos` reports
// its include dir together with the family macros it is compiled with, and
// `--libs` reports where to link it from. Both matter, because the public
// headers gate declarations on those macros (meos.h holds #if MEOS, #if
// POINTCLOUD and #if JSON blocks), so a hand-kept -D list that disagrees with
// the library either declares a symbol that cannot link or hides a family the
// library provides.
//
// Asking pkg-config also makes the binding relocatable: PKG_CONFIG_PATH selects
// which libmeos to build against, so a build points at a private prefix rather
// than inheriting whatever occupies a machine-wide directory. A prefix outside
// the loader's default search path needs LD_LIBRARY_PATH (or ldconfig).
#cgo pkg-config: meos

#cgo linux CFLAGS: -I/usr/local/include/ -I/usr/include/h3 -DMEOS=1 -DCBUFFER=1 -DH3=1 -DJSON=1 -DNPOINT=1 -DPOINTCLOUD=1 -DPOSE=1 -DQUADBIN=1 -DRASTER=1 -DRGEO=1
#cgo linux LDFLAGS: -L/usr/local/lib -lmeos -Wl,-rpath,/usr/local/lib
// H3 ships no pkg-config file, so the one dependency whose header the public
// MEOS headers expose (meos_h3.h includes <h3api.h>) names its include dir
// here. GEOS and GSL, the other exposed dependencies, resolve from the default
// include path.
#cgo darwin CFLAGS: -I/opt/homebrew/include/h3
#cgo linux CFLAGS: -I/usr/include/h3

#include <stddef.h>
#include "meos.h"
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