[geos-devel] 3.10.0rc1 (static)

[Roger Bivand]

R Windows and macOS binary packages use static builds only to ensure 
completeness. With Autotools, this involved some jumping through hoops and 
local hot patching of --static-clibs and --static-libs adding -lstdc++, 
but has remained feasible, with incantations like (-fPIC needed 
downstream to link the package shared object into the R language engine):

mkdir build-static
cd build-static
export CFLAGS=-fPIC
export CXXFLAGS=-fPIC
export CPPFLAGS=-fPIC
../configure --prefix=/home/rsb/static_old --enable-static=yes 
-disable-shared
make
make install

I have tried to grasp what has gone completely wrong with Cmake. I never 
succeeded in using Cmake before to create libgeos.a and libgeos_c.a to use 
in building R packages, but this was not a problem, because Autotools 
worked.

My current incantation is:

mkdir build-static
cd build-static
export CFLAGS=-fPIC
export CXXFLAGS=-fPIC
export CPPFLAGS=-fPIC
cmake -DCMAKE_BUILD_TYPE=Release -DBUILD_SHARED_LIBS=OFF 
-DCMAKE_INSTALL_PREFIX=/home/rsb/static -DCMAKE_VERBOSE_MAKEFILE:BOOL=ON 
..
cmake --build .
cmake --build . --target install

The simplest test is to try to build static, and to attempt to compile the 
a test from rgeos/configure.ac:

cat > geos_test.cc << _EOCONF
#include <geos_c.h>
#ifdef __cplusplus
extern "C" {
#endif
static void __errorHandler(const char *fmt, ...) {
     return;
}
static void __warningHandler(const char *fmt, ...) {
     return;
}
int main() {
     GEOSContextHandle_t r = initGEOS_r((GEOSMessageHandler) 
__warningHandler, (GEOSMessageHandler) __errorHandler);
     finishGEOS_r(r);
}
#ifdef __cplusplus
}
#endif
_EOCONF

g++ `<static/bin>geos-config --cflags` -o geos_test geos_test.cc \
`<static/bin>geos-config --static-clibs`

for me giving this failure for Cmake static, but success for Autotools:

/usr/bin/ld: /home/rsb/static/lib64/libgeos.a(WKTWriter.cpp.o): in 
function `geos::io::WKTWriter::writeNumber[abi:cxx11](double) const':
WKTWriter.cpp:(.text+0xe39): undefined reference to 
`geos_d2sfixed_buffered_n'
collect2: error: ld returned 1 exit status

This on current Fedora 34; when I can work out how to get a viable Cmake 
workflow, I can try to transfer it to Windows cross-compilation under MXE 
and native macOS.

Any help very welcome.

Roger

-- 
Roger Bivand
Emeritus Professor
Department of Economics, Norwegian School of Economics,
Postboks 3490 Ytre Sandviken, 5045 Bergen, Norway.
e-mail: Roger.Bivand at nhh.no
https://orcid.org/0000-0003-2392-6140
https://scholar.google.no/citations?user=AWeghB0AAAAJ&hl=en