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Install with python 3.9 fails: "implicit declaration of function 'LDL_numeric2' is invalid in C99" #195

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Baschdl opened this issue Jan 15, 2021 · 1 comment
Open

Install with python 3.9 fails: "implicit declaration of function 'LDL_numeric2' is invalid in C99" #195

Baschdl opened this issue Jan 15, 2021 · 1 comment

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@Baschdl
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Baschdl commented Jan 15, 2021

Installing ecos for python 3.9 on macOS 10.15.7 fails with the following output:

Building wheels for collected packages: ecos
  Building wheel for ecos (setup.py) ... error
  ERROR: Command errored out with exit status 1:
   command: /usr/local/opt/python@3.9/bin/python3.9 -u -c 'import sys, setuptools, tokenize; sys.argv[0] = '"'"'/private/var/folders/61/k4hq1hhj2010q7vccdm34qlr0000gn/T/pip-install-u8u5yefi/ecos_0c196a818c4e490b84dd70a97a2011a8/setup.py'"'"'; __file__='"'"'/private/var/folders/61/k4hq1hhj2010q7vccdm34qlr0000gn/T/pip-install-u8u5yefi/ecos_0c196a818c4e490b84dd70a97a2011a8/setup.py'"'"';f=getattr(tokenize, '"'"'open'"'"', open)(__file__);code=f.read().replace('"'"'\r\n'"'"', '"'"'\n'"'"');f.close();exec(compile(code, __file__, '"'"'exec'"'"'))' bdist_wheel -d /private/var/folders/61/k4hq1hhj2010q7vccdm34qlr0000gn/T/pip-wheel-rc125qgm
       cwd: /private/var/folders/61/k4hq1hhj2010q7vccdm34qlr0000gn/T/pip-install-u8u5yefi/ecos_0c196a818c4e490b84dd70a97a2011a8/
  Complete output (94 lines):
  running bdist_wheel
  running build
  running build_py
  creating build
  creating build/lib.macosx-10.15-x86_64-3.9
  creating build/lib.macosx-10.15-x86_64-3.9/ecos
  copying src/ecos/version.py -> build/lib.macosx-10.15-x86_64-3.9/ecos
  copying src/ecos/__init__.py -> build/lib.macosx-10.15-x86_64-3.9/ecos
  copying src/ecos/ecos.py -> build/lib.macosx-10.15-x86_64-3.9/ecos
  running build_ext
  building '_ecos' extension
  creating build/temp.macosx-10.15-x86_64-3.9
  creating build/temp.macosx-10.15-x86_64-3.9/ecos
  creating build/temp.macosx-10.15-x86_64-3.9/ecos/ecos_bb
  creating build/temp.macosx-10.15-x86_64-3.9/ecos/external
  creating build/temp.macosx-10.15-x86_64-3.9/ecos/external/amd
  creating build/temp.macosx-10.15-x86_64-3.9/ecos/external/amd/src
  creating build/temp.macosx-10.15-x86_64-3.9/ecos/external/ldl
  creating build/temp.macosx-10.15-x86_64-3.9/ecos/external/ldl/src
  creating build/temp.macosx-10.15-x86_64-3.9/ecos/src
  creating build/temp.macosx-10.15-x86_64-3.9/src
  clang -Wno-unused-result -Wsign-compare -Wunreachable-code -fno-common -dynamic -DNDEBUG -g -fwrapv -O3 -Wall -I/usr/local/include -isysroot /Library/Developer/CommandLineTools/SDKs/MacOSX10.15.sdk -I/Library/Developer/CommandLineTools/SDKs/MacOSX10.15.sdk/usr/include -I/Library/Developer/CommandLineTools/SDKs/MacOSX10.15.sdk/System/Library/Frameworks/Tk.framework/Versions/8.5/Headers -DPYTHON -DDLONG -DLDL_LONG -DCTRLC=1 -Iecos/include -Iecos/external/amd/include -Iecos/external/ldl/include -Iecos/external/SuiteSparse_config -I/usr/local/include -I/usr/local/opt/openssl@1.1/include -I/usr/local/opt/sqlite/include -I/usr/local/Cellar/python@3.9/3.9.1_4/Frameworks/Python.framework/Versions/3.9/include/python3.9 -I/usr/local/lib/python3.9/site-packages/numpy/core/include -c ecos/ecos_bb/ecos_bb.c -o build/temp.macosx-10.15-x86_64-3.9/ecos/ecos_bb/ecos_bb.o
  ecos/ecos_bb/ecos_bb.c:41:13: warning: unused function 'print_ecos_solution' [-Wunused-function]
  static void print_ecos_solution(ecos_bb_pwork* prob){
              ^
  ecos/ecos_bb/ecos_bb.c:47:13: warning: unused function 'print_ecos_xequil' [-Wunused-function]
  static void print_ecos_xequil(ecos_bb_pwork* prob){
              ^
  ecos/ecos_bb/ecos_bb.c:58:13: warning: unused function 'print_ecos_h' [-Wunused-function]
  static void print_ecos_h(ecos_bb_pwork* prob){
              ^
  ecos/ecos_bb/ecos_bb.c:64:13: warning: unused function 'print_ecos_c' [-Wunused-function]
  static void print_ecos_c(ecos_bb_pwork* prob){
              ^
  ecos/ecos_bb/ecos_bb.c:70:13: warning: unused function 'print_node' [-Wunused-function]
  static void print_node(ecos_bb_pwork* prob, idxint i){
              ^
  ecos/ecos_bb/ecos_bb.c:91:13: warning: unused function 'print_stats' [-Wunused-function]
  static void print_stats(ecos_bb_pwork* prob){
              ^
  6 warnings generated.
  clang -Wno-unused-result -Wsign-compare -Wunreachable-code -fno-common -dynamic -DNDEBUG -g -fwrapv -O3 -Wall -I/usr/local/include -isysroot /Library/Developer/CommandLineTools/SDKs/MacOSX10.15.sdk -I/Library/Developer/CommandLineTools/SDKs/MacOSX10.15.sdk/usr/include -I/Library/Developer/CommandLineTools/SDKs/MacOSX10.15.sdk/System/Library/Frameworks/Tk.framework/Versions/8.5/Headers -DPYTHON -DDLONG -DLDL_LONG -DCTRLC=1 -Iecos/include -Iecos/external/amd/include -Iecos/external/ldl/include -Iecos/external/SuiteSparse_config -I/usr/local/include -I/usr/local/opt/openssl@1.1/include -I/usr/local/opt/sqlite/include -I/usr/local/Cellar/python@3.9/3.9.1_4/Frameworks/Python.framework/Versions/3.9/include/python3.9 -I/usr/local/lib/python3.9/site-packages/numpy/core/include -c ecos/ecos_bb/ecos_bb_preproc.c -o build/temp.macosx-10.15-x86_64-3.9/ecos/ecos_bb/ecos_bb_preproc.o
  In file included from ecos/ecos_bb/ecos_bb_preproc.c:28:
  ecos/include/ecos_bb.h:164:14: warning: unused function 'get_bool_node_id' [-Wunused-function]
  static char* get_bool_node_id(idxint idx, ecos_bb_pwork* prob){
               ^
  ecos/include/ecos_bb.h:168:16: warning: unused function 'get_int_node_id' [-Wunused-function]
  static pfloat* get_int_node_id(idxint idx, ecos_bb_pwork* prob){
                 ^
  ecos/include/ecos_bb.h:176:15: warning: unused function 'pfloat_round' [-Wunused-function]
  static pfloat pfloat_round(pfloat number){
                ^
  ecos/include/ecos_bb.h:180:15: warning: unused function 'pfloat_ceil' [-Wunused-function]
  static pfloat pfloat_ceil(pfloat number, pfloat integer_tol){
                ^
  ecos/include/ecos_bb.h:184:15: warning: unused function 'pfloat_floor' [-Wunused-function]
  static pfloat pfloat_floor(pfloat number, pfloat integer_tol){
                ^
  ecos/include/ecos_bb.h:188:15: warning: unused function 'float_eqls' [-Wunused-function]
  static idxint float_eqls(pfloat a, pfloat b, pfloat integer_tol){
                ^
  6 warnings generated.
  clang -Wno-unused-result -Wsign-compare -Wunreachable-code -fno-common -dynamic -DNDEBUG -g -fwrapv -O3 -Wall -I/usr/local/include -isysroot /Library/Developer/CommandLineTools/SDKs/MacOSX10.15.sdk -I/Library/Developer/CommandLineTools/SDKs/MacOSX10.15.sdk/usr/include -I/Library/Developer/CommandLineTools/SDKs/MacOSX10.15.sdk/System/Library/Frameworks/Tk.framework/Versions/8.5/Headers -DPYTHON -DDLONG -DLDL_LONG -DCTRLC=1 -Iecos/include -Iecos/external/amd/include -Iecos/external/ldl/include -Iecos/external/SuiteSparse_config -I/usr/local/include -I/usr/local/opt/openssl@1.1/include -I/usr/local/opt/sqlite/include -I/usr/local/Cellar/python@3.9/3.9.1_4/Frameworks/Python.framework/Versions/3.9/include/python3.9 -I/usr/local/lib/python3.9/site-packages/numpy/core/include -c ecos/external/amd/src/amd_1.c -o build/temp.macosx-10.15-x86_64-3.9/ecos/external/amd/src/amd_1.o
  clang -Wno-unused-result -Wsign-compare -Wunreachable-code -fno-common -dynamic -DNDEBUG -g -fwrapv -O3 -Wall -I/usr/local/include -isysroot /Library/Developer/CommandLineTools/SDKs/MacOSX10.15.sdk -I/Library/Developer/CommandLineTools/SDKs/MacOSX10.15.sdk/usr/include -I/Library/Developer/CommandLineTools/SDKs/MacOSX10.15.sdk/System/Library/Frameworks/Tk.framework/Versions/8.5/Headers -DPYTHON -DDLONG -DLDL_LONG -DCTRLC=1 -Iecos/include -Iecos/external/amd/include -Iecos/external/ldl/include -Iecos/external/SuiteSparse_config -I/usr/local/include -I/usr/local/opt/openssl@1.1/include -I/usr/local/opt/sqlite/include -I/usr/local/Cellar/python@3.9/3.9.1_4/Frameworks/Python.framework/Versions/3.9/include/python3.9 -I/usr/local/lib/python3.9/site-packages/numpy/core/include -c ecos/external/amd/src/amd_2.c -o build/temp.macosx-10.15-x86_64-3.9/ecos/external/amd/src/amd_2.o
  clang -Wno-unused-result -Wsign-compare -Wunreachable-code -fno-common -dynamic -DNDEBUG -g -fwrapv -O3 -Wall -I/usr/local/include -isysroot /Library/Developer/CommandLineTools/SDKs/MacOSX10.15.sdk -I/Library/Developer/CommandLineTools/SDKs/MacOSX10.15.sdk/usr/include -I/Library/Developer/CommandLineTools/SDKs/MacOSX10.15.sdk/System/Library/Frameworks/Tk.framework/Versions/8.5/Headers -DPYTHON -DDLONG -DLDL_LONG -DCTRLC=1 -Iecos/include -Iecos/external/amd/include -Iecos/external/ldl/include -Iecos/external/SuiteSparse_config -I/usr/local/include -I/usr/local/opt/openssl@1.1/include -I/usr/local/opt/sqlite/include -I/usr/local/Cellar/python@3.9/3.9.1_4/Frameworks/Python.framework/Versions/3.9/include/python3.9 -I/usr/local/lib/python3.9/site-packages/numpy/core/include -c ecos/external/amd/src/amd_aat.c -o build/temp.macosx-10.15-x86_64-3.9/ecos/external/amd/src/amd_aat.o
  clang -Wno-unused-result -Wsign-compare -Wunreachable-code -fno-common -dynamic -DNDEBUG -g -fwrapv -O3 -Wall -I/usr/local/include -isysroot /Library/Developer/CommandLineTools/SDKs/MacOSX10.15.sdk -I/Library/Developer/CommandLineTools/SDKs/MacOSX10.15.sdk/usr/include -I/Library/Developer/CommandLineTools/SDKs/MacOSX10.15.sdk/System/Library/Frameworks/Tk.framework/Versions/8.5/Headers -DPYTHON -DDLONG -DLDL_LONG -DCTRLC=1 -Iecos/include -Iecos/external/amd/include -Iecos/external/ldl/include -Iecos/external/SuiteSparse_config -I/usr/local/include -I/usr/local/opt/openssl@1.1/include -I/usr/local/opt/sqlite/include -I/usr/local/Cellar/python@3.9/3.9.1_4/Frameworks/Python.framework/Versions/3.9/include/python3.9 -I/usr/local/lib/python3.9/site-packages/numpy/core/include -c ecos/external/amd/src/amd_control.c -o build/temp.macosx-10.15-x86_64-3.9/ecos/external/amd/src/amd_control.o
  clang -Wno-unused-result -Wsign-compare -Wunreachable-code -fno-common -dynamic -DNDEBUG -g -fwrapv -O3 -Wall -I/usr/local/include -isysroot /Library/Developer/CommandLineTools/SDKs/MacOSX10.15.sdk -I/Library/Developer/CommandLineTools/SDKs/MacOSX10.15.sdk/usr/include -I/Library/Developer/CommandLineTools/SDKs/MacOSX10.15.sdk/System/Library/Frameworks/Tk.framework/Versions/8.5/Headers -DPYTHON -DDLONG -DLDL_LONG -DCTRLC=1 -Iecos/include -Iecos/external/amd/include -Iecos/external/ldl/include -Iecos/external/SuiteSparse_config -I/usr/local/include -I/usr/local/opt/openssl@1.1/include -I/usr/local/opt/sqlite/include -I/usr/local/Cellar/python@3.9/3.9.1_4/Frameworks/Python.framework/Versions/3.9/include/python3.9 -I/usr/local/lib/python3.9/site-packages/numpy/core/include -c ecos/external/amd/src/amd_defaults.c -o build/temp.macosx-10.15-x86_64-3.9/ecos/external/amd/src/amd_defaults.o
  clang -Wno-unused-result -Wsign-compare -Wunreachable-code -fno-common -dynamic -DNDEBUG -g -fwrapv -O3 -Wall -I/usr/local/include -isysroot /Library/Developer/CommandLineTools/SDKs/MacOSX10.15.sdk -I/Library/Developer/CommandLineTools/SDKs/MacOSX10.15.sdk/usr/include -I/Library/Developer/CommandLineTools/SDKs/MacOSX10.15.sdk/System/Library/Frameworks/Tk.framework/Versions/8.5/Headers -DPYTHON -DDLONG -DLDL_LONG -DCTRLC=1 -Iecos/include -Iecos/external/amd/include -Iecos/external/ldl/include -Iecos/external/SuiteSparse_config -I/usr/local/include -I/usr/local/opt/openssl@1.1/include -I/usr/local/opt/sqlite/include -I/usr/local/Cellar/python@3.9/3.9.1_4/Frameworks/Python.framework/Versions/3.9/include/python3.9 -I/usr/local/lib/python3.9/site-packages/numpy/core/include -c ecos/external/amd/src/amd_dump.c -o build/temp.macosx-10.15-x86_64-3.9/ecos/external/amd/src/amd_dump.o
  clang -Wno-unused-result -Wsign-compare -Wunreachable-code -fno-common -dynamic -DNDEBUG -g -fwrapv -O3 -Wall -I/usr/local/include -isysroot /Library/Developer/CommandLineTools/SDKs/MacOSX10.15.sdk -I/Library/Developer/CommandLineTools/SDKs/MacOSX10.15.sdk/usr/include -I/Library/Developer/CommandLineTools/SDKs/MacOSX10.15.sdk/System/Library/Frameworks/Tk.framework/Versions/8.5/Headers -DPYTHON -DDLONG -DLDL_LONG -DCTRLC=1 -Iecos/include -Iecos/external/amd/include -Iecos/external/ldl/include -Iecos/external/SuiteSparse_config -I/usr/local/include -I/usr/local/opt/openssl@1.1/include -I/usr/local/opt/sqlite/include -I/usr/local/Cellar/python@3.9/3.9.1_4/Frameworks/Python.framework/Versions/3.9/include/python3.9 -I/usr/local/lib/python3.9/site-packages/numpy/core/include -c ecos/external/amd/src/amd_global.c -o build/temp.macosx-10.15-x86_64-3.9/ecos/external/amd/src/amd_global.o
  clang -Wno-unused-result -Wsign-compare -Wunreachable-code -fno-common -dynamic -DNDEBUG -g -fwrapv -O3 -Wall -I/usr/local/include -isysroot /Library/Developer/CommandLineTools/SDKs/MacOSX10.15.sdk -I/Library/Developer/CommandLineTools/SDKs/MacOSX10.15.sdk/usr/include -I/Library/Developer/CommandLineTools/SDKs/MacOSX10.15.sdk/System/Library/Frameworks/Tk.framework/Versions/8.5/Headers -DPYTHON -DDLONG -DLDL_LONG -DCTRLC=1 -Iecos/include -Iecos/external/amd/include -Iecos/external/ldl/include -Iecos/external/SuiteSparse_config -I/usr/local/include -I/usr/local/opt/openssl@1.1/include -I/usr/local/opt/sqlite/include -I/usr/local/Cellar/python@3.9/3.9.1_4/Frameworks/Python.framework/Versions/3.9/include/python3.9 -I/usr/local/lib/python3.9/site-packages/numpy/core/include -c ecos/external/amd/src/amd_info.c -o build/temp.macosx-10.15-x86_64-3.9/ecos/external/amd/src/amd_info.o
  clang -Wno-unused-result -Wsign-compare -Wunreachable-code -fno-common -dynamic -DNDEBUG -g -fwrapv -O3 -Wall -I/usr/local/include -isysroot /Library/Developer/CommandLineTools/SDKs/MacOSX10.15.sdk -I/Library/Developer/CommandLineTools/SDKs/MacOSX10.15.sdk/usr/include -I/Library/Developer/CommandLineTools/SDKs/MacOSX10.15.sdk/System/Library/Frameworks/Tk.framework/Versions/8.5/Headers -DPYTHON -DDLONG -DLDL_LONG -DCTRLC=1 -Iecos/include -Iecos/external/amd/include -Iecos/external/ldl/include -Iecos/external/SuiteSparse_config -I/usr/local/include -I/usr/local/opt/openssl@1.1/include -I/usr/local/opt/sqlite/include -I/usr/local/Cellar/python@3.9/3.9.1_4/Frameworks/Python.framework/Versions/3.9/include/python3.9 -I/usr/local/lib/python3.9/site-packages/numpy/core/include -c ecos/external/amd/src/amd_order.c -o build/temp.macosx-10.15-x86_64-3.9/ecos/external/amd/src/amd_order.o
  clang -Wno-unused-result -Wsign-compare -Wunreachable-code -fno-common -dynamic -DNDEBUG -g -fwrapv -O3 -Wall -I/usr/local/include -isysroot /Library/Developer/CommandLineTools/SDKs/MacOSX10.15.sdk -I/Library/Developer/CommandLineTools/SDKs/MacOSX10.15.sdk/usr/include -I/Library/Developer/CommandLineTools/SDKs/MacOSX10.15.sdk/System/Library/Frameworks/Tk.framework/Versions/8.5/Headers -DPYTHON -DDLONG -DLDL_LONG -DCTRLC=1 -Iecos/include -Iecos/external/amd/include -Iecos/external/ldl/include -Iecos/external/SuiteSparse_config -I/usr/local/include -I/usr/local/opt/openssl@1.1/include -I/usr/local/opt/sqlite/include -I/usr/local/Cellar/python@3.9/3.9.1_4/Frameworks/Python.framework/Versions/3.9/include/python3.9 -I/usr/local/lib/python3.9/site-packages/numpy/core/include -c ecos/external/amd/src/amd_post_tree.c -o build/temp.macosx-10.15-x86_64-3.9/ecos/external/amd/src/amd_post_tree.o
  clang -Wno-unused-result -Wsign-compare -Wunreachable-code -fno-common -dynamic -DNDEBUG -g -fwrapv -O3 -Wall -I/usr/local/include -isysroot /Library/Developer/CommandLineTools/SDKs/MacOSX10.15.sdk -I/Library/Developer/CommandLineTools/SDKs/MacOSX10.15.sdk/usr/include -I/Library/Developer/CommandLineTools/SDKs/MacOSX10.15.sdk/System/Library/Frameworks/Tk.framework/Versions/8.5/Headers -DPYTHON -DDLONG -DLDL_LONG -DCTRLC=1 -Iecos/include -Iecos/external/amd/include -Iecos/external/ldl/include -Iecos/external/SuiteSparse_config -I/usr/local/include -I/usr/local/opt/openssl@1.1/include -I/usr/local/opt/sqlite/include -I/usr/local/Cellar/python@3.9/3.9.1_4/Frameworks/Python.framework/Versions/3.9/include/python3.9 -I/usr/local/lib/python3.9/site-packages/numpy/core/include -c ecos/external/amd/src/amd_postorder.c -o build/temp.macosx-10.15-x86_64-3.9/ecos/external/amd/src/amd_postorder.o
  clang -Wno-unused-result -Wsign-compare -Wunreachable-code -fno-common -dynamic -DNDEBUG -g -fwrapv -O3 -Wall -I/usr/local/include -isysroot /Library/Developer/CommandLineTools/SDKs/MacOSX10.15.sdk -I/Library/Developer/CommandLineTools/SDKs/MacOSX10.15.sdk/usr/include -I/Library/Developer/CommandLineTools/SDKs/MacOSX10.15.sdk/System/Library/Frameworks/Tk.framework/Versions/8.5/Headers -DPYTHON -DDLONG -DLDL_LONG -DCTRLC=1 -Iecos/include -Iecos/external/amd/include -Iecos/external/ldl/include -Iecos/external/SuiteSparse_config -I/usr/local/include -I/usr/local/opt/openssl@1.1/include -I/usr/local/opt/sqlite/include -I/usr/local/Cellar/python@3.9/3.9.1_4/Frameworks/Python.framework/Versions/3.9/include/python3.9 -I/usr/local/lib/python3.9/site-packages/numpy/core/include -c ecos/external/amd/src/amd_preprocess.c -o build/temp.macosx-10.15-x86_64-3.9/ecos/external/amd/src/amd_preprocess.o
  clang -Wno-unused-result -Wsign-compare -Wunreachable-code -fno-common -dynamic -DNDEBUG -g -fwrapv -O3 -Wall -I/usr/local/include -isysroot /Library/Developer/CommandLineTools/SDKs/MacOSX10.15.sdk -I/Library/Developer/CommandLineTools/SDKs/MacOSX10.15.sdk/usr/include -I/Library/Developer/CommandLineTools/SDKs/MacOSX10.15.sdk/System/Library/Frameworks/Tk.framework/Versions/8.5/Headers -DPYTHON -DDLONG -DLDL_LONG -DCTRLC=1 -Iecos/include -Iecos/external/amd/include -Iecos/external/ldl/include -Iecos/external/SuiteSparse_config -I/usr/local/include -I/usr/local/opt/openssl@1.1/include -I/usr/local/opt/sqlite/include -I/usr/local/Cellar/python@3.9/3.9.1_4/Frameworks/Python.framework/Versions/3.9/include/python3.9 -I/usr/local/lib/python3.9/site-packages/numpy/core/include -c ecos/external/amd/src/amd_valid.c -o build/temp.macosx-10.15-x86_64-3.9/ecos/external/amd/src/amd_valid.o
  clang -Wno-unused-result -Wsign-compare -Wunreachable-code -fno-common -dynamic -DNDEBUG -g -fwrapv -O3 -Wall -I/usr/local/include -isysroot /Library/Developer/CommandLineTools/SDKs/MacOSX10.15.sdk -I/Library/Developer/CommandLineTools/SDKs/MacOSX10.15.sdk/usr/include -I/Library/Developer/CommandLineTools/SDKs/MacOSX10.15.sdk/System/Library/Frameworks/Tk.framework/Versions/8.5/Headers -DPYTHON -DDLONG -DLDL_LONG -DCTRLC=1 -Iecos/include -Iecos/external/amd/include -Iecos/external/ldl/include -Iecos/external/SuiteSparse_config -I/usr/local/include -I/usr/local/opt/openssl@1.1/include -I/usr/local/opt/sqlite/include -I/usr/local/Cellar/python@3.9/3.9.1_4/Frameworks/Python.framework/Versions/3.9/include/python3.9 -I/usr/local/lib/python3.9/site-packages/numpy/core/include -c ecos/external/ldl/src/ldl.c -o build/temp.macosx-10.15-x86_64-3.9/ecos/external/ldl/src/ldl.o
  clang -Wno-unused-result -Wsign-compare -Wunreachable-code -fno-common -dynamic -DNDEBUG -g -fwrapv -O3 -Wall -I/usr/local/include -isysroot /Library/Developer/CommandLineTools/SDKs/MacOSX10.15.sdk -I/Library/Developer/CommandLineTools/SDKs/MacOSX10.15.sdk/usr/include -I/Library/Developer/CommandLineTools/SDKs/MacOSX10.15.sdk/System/Library/Frameworks/Tk.framework/Versions/8.5/Headers -DPYTHON -DDLONG -DLDL_LONG -DCTRLC=1 -Iecos/include -Iecos/external/amd/include -Iecos/external/ldl/include -Iecos/external/SuiteSparse_config -I/usr/local/include -I/usr/local/opt/openssl@1.1/include -I/usr/local/opt/sqlite/include -I/usr/local/Cellar/python@3.9/3.9.1_4/Frameworks/Python.framework/Versions/3.9/include/python3.9 -I/usr/local/lib/python3.9/site-packages/numpy/core/include -c ecos/src/cone.c -o build/temp.macosx-10.15-x86_64-3.9/ecos/src/cone.o
  clang -Wno-unused-result -Wsign-compare -Wunreachable-code -fno-common -dynamic -DNDEBUG -g -fwrapv -O3 -Wall -I/usr/local/include -isysroot /Library/Developer/CommandLineTools/SDKs/MacOSX10.15.sdk -I/Library/Developer/CommandLineTools/SDKs/MacOSX10.15.sdk/usr/include -I/Library/Developer/CommandLineTools/SDKs/MacOSX10.15.sdk/System/Library/Frameworks/Tk.framework/Versions/8.5/Headers -DPYTHON -DDLONG -DLDL_LONG -DCTRLC=1 -Iecos/include -Iecos/external/amd/include -Iecos/external/ldl/include -Iecos/external/SuiteSparse_config -I/usr/local/include -I/usr/local/opt/openssl@1.1/include -I/usr/local/opt/sqlite/include -I/usr/local/Cellar/python@3.9/3.9.1_4/Frameworks/Python.framework/Versions/3.9/include/python3.9 -I/usr/local/lib/python3.9/site-packages/numpy/core/include -c ecos/src/ctrlc.c -o build/temp.macosx-10.15-x86_64-3.9/ecos/src/ctrlc.o
  clang -Wno-unused-result -Wsign-compare -Wunreachable-code -fno-common -dynamic -DNDEBUG -g -fwrapv -O3 -Wall -I/usr/local/include -isysroot /Library/Developer/CommandLineTools/SDKs/MacOSX10.15.sdk -I/Library/Developer/CommandLineTools/SDKs/MacOSX10.15.sdk/usr/include -I/Library/Developer/CommandLineTools/SDKs/MacOSX10.15.sdk/System/Library/Frameworks/Tk.framework/Versions/8.5/Headers -DPYTHON -DDLONG -DLDL_LONG -DCTRLC=1 -Iecos/include -Iecos/external/amd/include -Iecos/external/ldl/include -Iecos/external/SuiteSparse_config -I/usr/local/include -I/usr/local/opt/openssl@1.1/include -I/usr/local/opt/sqlite/include -I/usr/local/Cellar/python@3.9/3.9.1_4/Frameworks/Python.framework/Versions/3.9/include/python3.9 -I/usr/local/lib/python3.9/site-packages/numpy/core/include -c ecos/src/ecos.c -o build/temp.macosx-10.15-x86_64-3.9/ecos/src/ecos.o
  clang -Wno-unused-result -Wsign-compare -Wunreachable-code -fno-common -dynamic -DNDEBUG -g -fwrapv -O3 -Wall -I/usr/local/include -isysroot /Library/Developer/CommandLineTools/SDKs/MacOSX10.15.sdk -I/Library/Developer/CommandLineTools/SDKs/MacOSX10.15.sdk/usr/include -I/Library/Developer/CommandLineTools/SDKs/MacOSX10.15.sdk/System/Library/Frameworks/Tk.framework/Versions/8.5/Headers -DPYTHON -DDLONG -DLDL_LONG -DCTRLC=1 -Iecos/include -Iecos/external/amd/include -Iecos/external/ldl/include -Iecos/external/SuiteSparse_config -I/usr/local/include -I/usr/local/opt/openssl@1.1/include -I/usr/local/opt/sqlite/include -I/usr/local/Cellar/python@3.9/3.9.1_4/Frameworks/Python.framework/Versions/3.9/include/python3.9 -I/usr/local/lib/python3.9/site-packages/numpy/core/include -c ecos/src/equil.c -o build/temp.macosx-10.15-x86_64-3.9/ecos/src/equil.o
  clang -Wno-unused-result -Wsign-compare -Wunreachable-code -fno-common -dynamic -DNDEBUG -g -fwrapv -O3 -Wall -I/usr/local/include -isysroot /Library/Developer/CommandLineTools/SDKs/MacOSX10.15.sdk -I/Library/Developer/CommandLineTools/SDKs/MacOSX10.15.sdk/usr/include -I/Library/Developer/CommandLineTools/SDKs/MacOSX10.15.sdk/System/Library/Frameworks/Tk.framework/Versions/8.5/Headers -DPYTHON -DDLONG -DLDL_LONG -DCTRLC=1 -Iecos/include -Iecos/external/amd/include -Iecos/external/ldl/include -Iecos/external/SuiteSparse_config -I/usr/local/include -I/usr/local/opt/openssl@1.1/include -I/usr/local/opt/sqlite/include -I/usr/local/Cellar/python@3.9/3.9.1_4/Frameworks/Python.framework/Versions/3.9/include/python3.9 -I/usr/local/lib/python3.9/site-packages/numpy/core/include -c ecos/src/expcone.c -o build/temp.macosx-10.15-x86_64-3.9/ecos/src/expcone.o
  clang -Wno-unused-result -Wsign-compare -Wunreachable-code -fno-common -dynamic -DNDEBUG -g -fwrapv -O3 -Wall -I/usr/local/include -isysroot /Library/Developer/CommandLineTools/SDKs/MacOSX10.15.sdk -I/Library/Developer/CommandLineTools/SDKs/MacOSX10.15.sdk/usr/include -I/Library/Developer/CommandLineTools/SDKs/MacOSX10.15.sdk/System/Library/Frameworks/Tk.framework/Versions/8.5/Headers -DPYTHON -DDLONG -DLDL_LONG -DCTRLC=1 -Iecos/include -Iecos/external/amd/include -Iecos/external/ldl/include -Iecos/external/SuiteSparse_config -I/usr/local/include -I/usr/local/opt/openssl@1.1/include -I/usr/local/opt/sqlite/include -I/usr/local/Cellar/python@3.9/3.9.1_4/Frameworks/Python.framework/Versions/3.9/include/python3.9 -I/usr/local/lib/python3.9/site-packages/numpy/core/include -c ecos/src/kkt.c -o build/temp.macosx-10.15-x86_64-3.9/ecos/src/kkt.o
  ecos/src/kkt.c:47:7: error: implicit declaration of function 'LDL_numeric2' is invalid in C99 [-Werror,-Wimplicit-function-declaration]
          nd = LDL_numeric2(
               ^
  ecos/src/kkt.c:47:7: note: did you mean 'ldl_numeric'?
  /usr/local/include/ldl.h:48:5: note: 'ldl_numeric' declared here
  int ldl_numeric (int n, int Ap [ ], int Ai [ ], double Ax [ ],
      ^
  ecos/src/kkt.c:120:2: error: implicit declaration of function 'LDL_lsolve2' is invalid in C99 [-Werror,-Wimplicit-function-declaration]
          LDL_lsolve2(nK, Pb, KKT->L->jc, KKT->L->ir, KKT->L->pr, Px );
          ^
  2 errors generated.
  error: command '/usr/bin/clang' failed with exit code 1
  ----------------------------------------
  ERROR: Failed building wheel for ecos
@frec-james
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In the rare event someone else ends up on this solitary google search result for 'LDL_numeric2', I hit this issue due to includes with suite-sparse interfering with the includes that ECOS would otherwise use.

I was able to get the install to complete by dropping the suite-sparse includes from my LDFLAGS and CPPFLAGS.

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