Problems to rebuild wcsjs from source

[caillat]

Hi,

I know that this project is one quite old of yours, but I do hope that you can provide me with some help.
Extremely interested in having wcsjs in the browser, in the context of a radio astronomy data mining and visualization ( see artemix.obspm.fr ), I tried in the first place to use wcsjs as it comes after a git clone.

Unfortunately, when it's used in the browser it exhibits a strange behaviour. E.g. successive calls to w.pix2sky(x,y) with varying (x,y) would return the same result ( the one returned by the 1st call).

Then I thought I had to rebuild wcs.js from the source, using the build procedure coming the project. Alas I end up with a message saying :

wasm-ld: error: unknown file type: wcs.o

I have the feeling that I'm quite close to the success, so any clue would be more than welcome !

Below the log of the build

/home/caillat/emsdk/upstream/emscripten/emcc -v -O2 src/wrapper.c -I/usr/local/include -L/usr/local/lib -lwcs -lm -o wcslib.js -s EXPORTED_FUNCTIONS="['_getWcs', '_pix2sky', '_sky2pix']";
shared:INFO: (Emscripten: Running sanity checks)
 "/home/caillat/emsdk/upstream/bin/clang" -DEMSCRIPTEN -fignore-exceptions -mllvm -combiner-global-alias-analysis=false -mllvm -enable-emscripten-sjlj -mllvm -disable-lsr -Xclang -isystem/home/caillat/emsdk/upstream/emscripten/system/include/SDL -target wasm32-unknown-emscripten -D__EMSCRIPTEN_major__=2 -D__EMSCRIPTEN_minor__=0 -D__EMSCRIPTEN_tiny__=10 -D_LIBCPP_ABI_VERSION=2 -Dunix -D__unix -D__unix__ -Werror=implicit-function-declaration --sysroot=/home/caillat/emsdk/upstream/emscripten/system -Xclang -isystem/home/caillat/emsdk/upstream/emscripten/cache/wasm/include -Xclang -iwithsysroot/include/compat -Xclang -iwithsysroot/include/libc -Xclang -iwithsysroot/lib/libc/musl/arch/emscripten -Xclang -iwithsysroot/local/include -Xclang -iwithsysroot/include/SSE -Xclang -iwithsysroot/include/neon -Xclang -iwithsysroot/lib/compiler-rt/include -Xclang -iwithsysroot/lib/libunwind/include -v -O2 -I/usr/local/include -o wcslib.js src/wrapper.c -c -o /tmp/emscripten_temp_t7nv0e97/wrapper_0.o
clang version 12.0.0 (/b/s/w/ir/cache/git/chromium.googlesource.com-external-github.com-llvm-llvm--project 445289aa63e1b82b9eea6497fb2d0443813a9d4e)
Target: wasm32-unknown-emscripten
Thread model: posix
InstalledDir: /home/caillat/emsdk/upstream/bin
 (in-process)
 "/home/caillat/emsdk/upstream/bin/clang-12" -cc1 -triple wasm32-unknown-emscripten -emit-obj --mrelax-relocations -disable-free -main-file-name wrapper.c -mrelocation-model static -mframe-pointer=none -fno-rounding-math -mconstructor-aliases -target-cpu generic -fvisibility hidden -debugger-tuning=gdb -v -resource-dir /home/caillat/emsdk/upstream/lib/clang/12.0.0 -D EMSCRIPTEN -D __EMSCRIPTEN_major__=2 -D __EMSCRIPTEN_minor__=0 -D __EMSCRIPTEN_tiny__=10 -D _LIBCPP_ABI_VERSION=2 -D unix -D __unix -D __unix__ -I /usr/local/include -isysroot /home/caillat/emsdk/upstream/emscripten/system -internal-isystem /home/caillat/emsdk/upstream/lib/clang/12.0.0/include -internal-isystem /home/caillat/emsdk/upstream/emscripten/system/include/wasm32-emscripten -internal-isystem /home/caillat/emsdk/upstream/emscripten/system/include -O2 -Werror=implicit-function-declaration -fdebug-compilation-dir /home/caillat/wcsjs-master -ferror-limit 19 -fgnuc-version=4.2.1 -fignore-exceptions -fcolor-diagnostics -vectorize-loops -vectorize-slp -isystem/home/caillat/emsdk/upstream/emscripten/system/include/SDL -isystem/home/caillat/emsdk/upstream/emscripten/cache/wasm/include -iwithsysroot/include/compat -iwithsysroot/include/libc -iwithsysroot/lib/libc/musl/arch/emscripten -iwithsysroot/local/include -iwithsysroot/include/SSE -iwithsysroot/include/neon -iwithsysroot/lib/compiler-rt/include -iwithsysroot/lib/libunwind/include -mllvm -combiner-global-alias-analysis=false -mllvm -enable-emscripten-sjlj -mllvm -disable-lsr -o /tmp/emscripten_temp_t7nv0e97/wrapper_0.o -x c src/wrapper.c
clang -cc1 version 12.0.0 based upon LLVM 12.0.0git default target x86_64-unknown-linux-gnu
ignoring nonexistent directory "/home/caillat/emsdk/upstream/emscripten/cache/wasm/include"
ignoring nonexistent directory "/home/caillat/emsdk/upstream/emscripten/system/include/wasm32-emscripten"
#include "..." search starts here:
#include <...> search starts here:
 /usr/local/include
 /home/caillat/emsdk/upstream/emscripten/system/include/SDL
 /home/caillat/emsdk/upstream/emscripten/system/include/compat
 /home/caillat/emsdk/upstream/emscripten/system/include/libc
 /home/caillat/emsdk/upstream/emscripten/system/lib/libc/musl/arch/emscripten
 /home/caillat/emsdk/upstream/emscripten/system/local/include
 /home/caillat/emsdk/upstream/emscripten/system/include/SSE
 /home/caillat/emsdk/upstream/emscripten/system/include/neon
 /home/caillat/emsdk/upstream/emscripten/system/lib/compiler-rt/include
 /home/caillat/emsdk/upstream/emscripten/system/lib/libunwind/include
 /home/caillat/emsdk/upstream/lib/clang/12.0.0/include
 /home/caillat/emsdk/upstream/emscripten/system/include
End of search list.
 "/home/caillat/emsdk/upstream/bin/wasm-ld" -o wcslib.wasm /tmp/emscripten_temp_t7nv0e97/wrapper_0.o -L/usr/local/lib /usr/local/lib/libwcs.a -L/home/caillat/emsdk/upstream/emscripten/system/lib -L/home/caillat/emsdk/upstream/emscripten/cache/wasm /home/caillat/emsdk/upstream/emscripten/cache/wasm/libc.a /home/caillat/emsdk/upstream/emscripten/cache/wasm/libcompiler_rt.a /home/caillat/emsdk/upstream/emscripten/cache/wasm/libc++-noexcept.a /home/caillat/emsdk/upstream/emscripten/cache/wasm/libc++abi-noexcept.a /home/caillat/emsdk/upstream/emscripten/cache/wasm/libdlmalloc.a /home/caillat/emsdk/upstream/emscripten/cache/wasm/libc_rt_wasm.a /home/caillat/emsdk/upstream/emscripten/cache/wasm/libsockets.a -mllvm -combiner-global-alias-analysis=false -mllvm -enable-emscripten-sjlj -mllvm -disable-lsr --allow-undefined --strip-debug --export-table --export getWcs --export pix2sky --export sky2pix --export stackSave --export stackRestore --export stackAlloc --export __wasm_call_ctors --export __errno_location --export malloc --export free -z stack-size=5242880 --initial-memory=16777216 --no-entry --max-memory=16777216 --global-base=1024
wasm-ld: error: unknown file type: wcs.o
emcc: error: '/home/caillat/emsdk/upstream/bin/wasm-ld -o wcslib.wasm /tmp/emscripten_temp_t7nv0e97/wrapper_0.o -L/usr/local/lib /usr/local/lib/libwcs.a -L/home/caillat/emsdk/upstream/emscripten/system/lib -L/home/caillat/emsdk/upstream/emscripten/cache/wasm /home/caillat/emsdk/upstream/emscripten/cache/wasm/libc.a /home/caillat/emsdk/upstream/emscripten/cache/wasm/libcompiler_rt.a /home/caillat/emsdk/upstream/emscripten/cache/wasm/libc++-noexcept.a /home/caillat/emsdk/upstream/emscripten/cache/wasm/libc++abi-noexcept.a /home/caillat/emsdk/upstream/emscripten/cache/wasm/libdlmalloc.a /home/caillat/emsdk/upstream/emscripten/cache/wasm/libc_rt_wasm.a /home/caillat/emsdk/upstream/emscripten/cache/wasm/libsockets.a -mllvm -combiner-global-alias-analysis=false -mllvm -enable-emscripten-sjlj -mllvm -disable-lsr --allow-undefined --strip-debug --export-table --export getWcs --export pix2sky --export sky2pix --export stackSave --export stackRestore --export stackAlloc --export __wasm_call_ctors --export __errno_location --export malloc --export free -z stack-size=5242880 --initial-memory=16777216 --no-entry --max-memory=16777216 --global-base=1024' failed (1)
Makefile:9: recipe for target 'wcslib.js' failed
make: *** [wcslib.js] Error 1