CC for python distutils to build c

0
votes

I was trying to build c through python distutils. I want to replace CC with gcc and follow this page

CC=gcc python setup.py build

Then I got

gcc -DNDEBUG -g -fwrapv -O2 -Wall -Wstrict-prototypes -fno-strict-aliasing -Wdate-time -D_FORTIFY_SOURCE=2 -g -fstack-protector-strong -Wformat -Werror=format-security -fPIC -I/usr/include/python2.7 -c hello.c -o build/temp.linux-x86_64-2.7/hello.o

creating build/lib.linux-x86_64-2.7

x86_64-linux-gnu-gcc -pthread -shared -Wl,-O1 -Wl,-Bsymbolic-functions -Wl,-Bsymbolic-functions -Wl,-z,relro -fno-strict-aliasing -DNDEBUG -g -fwrapv -O2 -Wall -Wstrict-prototypes -Wdate-time -D_FORTIFY_SOURCE=2 -g -fstack-protector-strong -Wformat -Werror=format-security -Wl,-Bsymbolic-functions -Wl,-z,relro -Wdate-time -D_FORTIFY_SOURCE=2 -g -fstack-protector-strong -Wformat -Werror=format-security build/temp.linux-x86_64-2.7/hello.o -o build/lib.linux-x86_64-2.7/hello.so

CC only changed to gcc on first stage, and it would become original x86_64-linux-gnu-gcc, I am not sure is there anything missing, thanks.

2
pythonclinux
How about defining the linker with LD? – Antti Haapala
didn't work, However, I found the answer, it was LDSHARED needed to be defined – Schmidt

2 Answers

0
votes

You must set "CC" with

os.environ["CC"] = "GCC"

However, this sometimes does not work in windows and involves some changes in the config files.

  1. Create file "C:\Python27\Lib\distutils\distutils.cfg" and write this inside

Then insert the following code:

[build] compiler = gcc

  1. Remove all instances of "-mno-cygwin" gcc option from file "C:\Python27\Lib\distutils\cygwinccompiler.py":

  2. In the same file convert this:

    self.set_executables(compiler='gcc -mno-cygwin -O -Wall', compiler_so='gcc -mno-cygwin -mdll -O -Wall', compiler_cxx='g++ -mno-cygwin -O -Wall', linker_exe='gcc -mno-cygwin', linker_so='%s -mno-cygwin %s %s' % (self.linker_dll, shared_option, entry_point))

    to this:

    self.set_executables(compiler='gcc -O -Wall', compiler_so='gcc -mdll -O -Wall', compiler_cxx='g++ -O -Wall', linker_exe='gcc', linker_so='%s %s %s' % (self.linker_dll, shared_option, entry_point))

0
votes

I found the answer here, LDSHARED is the variable I need.

The full command would be like this

CC=gcc LDSHARED=gcc -pthread -shared python setup.py build