interesting, it crashed somewhere during the cosmopolitan tests

$ nix-shell --pure
....
7000000df430 00000062f41d _PyFunction_FastCall+109                                                                                                                                                                         
7000000df460 00000063029a fast_function+442                                                                                                                                                                                
7000000df4a0 000000630835 call_function+245                                                                                                                                                                                
7000000df4f0 000000635384 _PyEval_EvalFrameDefault+16004                                                     
7000000df610 00000063000f _PyEval_EvalCodeWithName+2271                                                      
7000000df6c0 000000630c9c PyEval_EvalCode+44                                                                 
7000000df720 00000062da64 builtin_exec_impl+479                                                              
7000000df760 00000062db48 builtin_exec+102                                                                   
7000000df7a0 0000005c1e4c _PyCFunction_FastCallKeywords+510                                                  
7000000df800 0000006309b9 call_function+633                                                                                                                                                                                
7000000df850 000000635384 _PyEval_EvalFrameDefault+16004                                                     
7000000df970 00000063000f _PyEval_EvalCodeWithName+2271                                                      
7000000dfa20 00000063017c fast_function+156                                                                  
7000000dfab0 000000630835 call_function+245                                                                  
7000000dfb00 000000635384 _PyEval_EvalFrameDefault+16004                                                     
7000000dfc20 00000063000f _PyEval_EvalCodeWithName+2271                                                      
7000000dfcd0 000000630d22 PyEval_EvalCodeEx+66                                                               
<truncated backtrace>                                                                                        
                                                                                                                                                                                                                           
`make MODE= -j8 o//third_party/python/Lib/test/test_pickle.py.runs` exited with 23:                          
o//third_party/python/pythontester.com -m test.test_pickle                                                   
consumed 13,171,706µs wall time                                                                              
ballooned to 37,952kb in size                                                                                
needed 12,988,666us cpu (1% kernel)                                                                          
caused 84,452 page faults (100% memcpy)                                                                      
900 context switch (0% consensual)                                                                                                                                                                                         
                                                                                                             
make: *** [third_party/python/python.mk:2704: o//third_party/python/Lib/test/test_pickle.py.runs] Error 23   
make: *** Waiting for unfinished jobs....                                                                    
18,374,233⏰ 18,163,338⏳ 123,960k       0iop o//third_party/python/pythontester.com -m test.test_decimal                                                                                                                  
builder for '/nix/store/mc4yz22nb9ci1pqwk380l1fs1k20jdkr-cosmopolitan-git.drv' failed with exit code 2                                                                                                                     
error: build of '/nix/store/mc4yz22nb9ci1pqwk380l1fs1k20jdkr-cosmopolitan-git.drv' failed

which is strange because cosmopolitan builds fine outside of nix (~6G free mem):

$ cat /proc/meminfo |grep ^Mem
MemTotal:         12006276 kB
MemFree:           3074232 kB
MemAvailable:    5867632 kB

Since I already had cosmopolitan on my drive, I symlinked it and adjusted mk:

$ git clone https://github.com/jacereda/cosmogfx --recurse-submodules
$ cd cosmogfx
cosmogfx $ ln -s ../cosmopolitan .
cosmogfx $ git diff mk
diff --git a/mk b/mk
index 1c886a0..3cc5bba 100755
--- a/mk
+++ b/mk
@@ -1,4 +1,8 @@
 #!/usr/bin/env bash
+cosmoc(){
+  cosmopolitan/o/tool/build/compile.com gcc "$@"
+}
+export PATH=$PATH:cosmopolitan/o/tool/build
 set -e
 install -d b
 gcc -s -ffunction-sections -fdata-sections -Wl,-gc-sections -fomit-frame-pointer -Os -pie -fPIC helper.c -o helper/linux -ldl
@@ -13,8 +17,9 @@ cosmoc -DDLOPEN=z_dlopen \
        -DELFCLASS=ELFCLASS64 \
        -DCV_NO_MAIN \
        -DCV_DYN \
-       -include cosmopolitan.h \
+       -include cosmopolitan/o/cosmopolitan.h \
        -I. \
+       -Icosmopolitan \
        -Imicroui/demo \
        -Imicroui/src \
        -Ifake \

Which got me this output:

$ ./mk
/usr/bin/ld: /tmp/ccyAFSBD.o:(.bss.z_dlopen+0x0): multiple definition of `z_dlopen'; /tmp/cczXXTJE.o:(.bss.z_dlopen+0x0): first defined here
/usr/bin/ld: /tmp/ccyAFSBD.o:(.bss.z_dlsym+0x0): multiple definition of `z_dlsym'; /tmp/cczXXTJE.o:(.bss.z_dlsym+0x0): first defined here
/usr/bin/ld: /tmp/ccyAFSBD.o:(.bss.z_dlclose+0x0): multiple definition of `z_dlclose'; /tmp/cczXXTJE.o:(.bss.z_dlclose+0x0): first defined here                                                                            /usr/bin/ld: /tmp/ccyAFSBD.o:(.bss.z_dlerror+0x0): multiple definition of `z_dlerror'; /tmp/cczXXTJE.o:(.bss.z_dlerror+0x0): first defined here                                                                            /usr/bin/ld: /tmp/cczXXTJE.o: relocation R_X86_64_32 against `.text.trampoline' can not be used when making a PIE object; recompile with -fPIE
/usr/bin/ld: /tmp/ccFYqk8g.o: relocation R_X86_64_32S against undefined symbol `__sysv2nt' can not be used when making a PIE object; recompile with -fPIE
/usr/bin/ld: /tmp/ccFJKOhU.o: warning: relocation against `AT_PHNUM' in read-only section `.text.elf_exec'
/usr/bin/ld: /tmp/cczXXTJE.o: in function `myvsnprintf':
cosmogfx.c:(.text.myvsnprintf+0x68): undefined reference to `__assert_fail'
/usr/bin/ld: /tmp/cczXXTJE.o: in function `bitarrayFor':
cosmogfx.c:(.text.bitarrayFor+0x40): undefined reference to `__assert_fail'
/usr/bin/ld: /tmp/cczXXTJE.o: in function `cvrun_xlib':
cosmogfx.c:(.text.cvrun_xlib+0x90): undefined reference to `__assert_fail'
/usr/bin/ld: cosmogfx.c:(.text.cvrun_xlib+0xd5): undefined reference to `__assert_fail'                                                                                                                                    
/usr/bin/ld: cosmogfx.c:(.text.cvrun_xlib+0x11a): undefined reference to `__assert_fail'
/usr/bin/ld: /tmp/cczXXTJE.o:cosmogfx.c:(.text.cvrun_xlib+0x15f): more undefined references to `__assert_fail' follow
/usr/bin/ld: /tmp/cczXXTJE.o: in function `delcursor': 
cosmogfx.c:(.text.delcursor+0x1f): undefined reference to `DestroyIcon'
/usr/bin/ld: /tmp/cczXXTJE.o: in function `winsetcursor':
cosmogfx.c:(.text.winsetcursor+0x94): undefined reference to `GetDC'
/usr/bin/ld: cosmogfx.c:(.text.winsetcursor+0xcc): undefined reference to `CreateDIBSection'
/usr/bin/ld: cosmogfx.c:(.text.winsetcursor+0xec): undefined reference to `ReleaseDC'
/usr/bin/ld: cosmogfx.c:(.text.winsetcursor+0x25c): undefined reference to `CreateBitmap'
/usr/bin/ld: cosmogfx.c:(.text.winsetcursor+0x272): undefined reference to `CreateIconIndirect'
/usr/bin/ld: cosmogfx.c:(.text.winsetcursor+0x288): undefined reference to `SetCursor'
/usr/bin/ld: cosmogfx.c:(.text.winsetcursor+0x297): undefined reference to `DeleteObject'
/usr/bin/ld: cosmogfx.c:(.text.winsetcursor+0x2a6): undefined reference to `DeleteObject'
/usr/bin/ld: /tmp/cczXXTJE.o: in function `osEvent_win':
cosmogfx.c:(.text.osEvent_win+0xc5): undefined reference to `LoadCursor'
/usr/bin/ld: cosmogfx.c:(.text.osEvent_win+0xcd): undefined reference to `SetCursor'
/usr/bin/ld: cosmogfx.c:(.text.osEvent_win+0xeb): undefined reference to `SetWindowLong'
/usr/bin/ld: cosmogfx.c:(.text.osEvent_win+0xff): undefined reference to `ShowWindow'
/usr/bin/ld: cosmogfx.c:(.text.osEvent_win+0x131): undefined reference to `SetWindowPos'
/usr/bin/ld: cosmogfx.c:(.text.osEvent_win+0x14b): undefined reference to `ShowWindow'
/usr/bin/ld: cosmogfx.c:(.text.osEvent_win+0x164): undefined reference to `SetWindowLong'
/usr/bin/ld: cosmogfx.c:(.text.osEvent_win+0x196): undefined reference to `SetWindowPos'
/usr/bin/ld: /tmp/cczXXTJE.o: in function `mapkey':
cosmogfx.c:(.text.mapkey+0x3e5): undefined reference to `GetKeyboardLayout'
/usr/bin/ld: cosmogfx.c:(.text.mapkey+0x3f7): undefined reference to `MapVirtualKeyEx'
/usr/bin/ld: /tmp/cczXXTJE.o: in function `onSETCURSOR':
cosmogfx.c:(.text.onSETCURSOR+0x31): undefined reference to `SetCursor'
/usr/bin/ld: /tmp/cczXXTJE.o: in function `onPAINT':
cosmogfx.c:(.text.onPAINT+0x2c): undefined reference to `GetDC'
/usr/bin/ld: cosmogfx.c:(.text.onPAINT+0x4a): undefined reference to `SwapBuffers'
/usr/bin/ld: cosmogfx.c:(.text.onPAINT+0x5d): undefined reference to `ReleaseDC'
/usr/bin/ld: /tmp/cczXXTJE.o: in function `winhandle': 
cosmogfx.c:(.text.winhandle+0x45d): undefined reference to `DefWindowProc'
collect2: error: ld returned 1 exit status

`make MODE= -j8 b/demo.com.dbg` exited with 1:
gcc -DDLOPEN=z_dlopen -DDLSYM=z_dlsym -DZ_SMALL -DSTDLIB=1 -DELFCLASS=ELFCLASS64 -DCV_NO_MAIN -DCV_DYN -include cosmopolitan/o/cosmopolitan.h -I. -Icosmopolitan -Imicroui/demo -Imicroui/src -Ifake -Iglcv/src -ffunction-
sections -fdata-sections -Wl,-gc-sections cosmogfx.c dtrampoline.c gl.c demo.c microui/src/microui.c renderer.c elf_loader.c b/helper.linux.zip.o b/helper.obsd.zip.o b/helper.fbsd.zip.o b/helper.nbsd.zip.o -o b/demo.com
.dbg -no-canonical-prefixes -fdiagnostics-color=always                                                                                                                                                                     
consumed 587,451µs wall time                                                                                                                                                                                               
ballooned to 44,888kb in size                                                                                                                                                                                              
needed 586,314us cpu (10% kernel)                                                                                                                                                                                          
caused 43,222 page faults (100% memcpy)                                                                                                                                                                                    
104 context switch (47% consensual)                                                                                                                                                                                        
performed 0 read and 2,576 write i/o operations

cosmoc? #1

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