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#!/usr/bin/env python3
## Copyright (c) 2015 Olivier Gayot <duskcoder@gmail.com>
##
##
## Permission is hereby granted, free of charge, to any person obtaining a
## copy of this software and associated documentation files (the "Software"), to
## deal in the Software without restriction, including without limitation the
## rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
## sell copies of the Software, and to permit persons to whom the Software is
## furnished to do so, subject to the following conditions:
##
## The above copyright notice and this permission notice shall be included in
## all copies or substantial portions of the Software.
##
## THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
## IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
## FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
## AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
## LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
## OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
## SOFTWARE.
class makefile_generator():
def __init__(self):
self._binary = 'a.out'
self.phony = []
def append_variable(self, name, value=None):
print('%s%.*s=' % (name, 16 - len(name), ' '), end='')
if value is not None:
print(' ' + value)
else:
print('')
def append_separator(self):
print('')
def append_rule(self, target, dep='', cmds=[]):
print(target + ':', end='')
if dep != '':
print(' ', end='')
print(dep)
for cmd in cmds:
print('\t%s' % (cmd))
def append_static_rule(self, target, dep='', cmds=[]):
self.append_rule(target, dep, cmds)
self.phony.append(target)
def gen(self):
# mandatory input
self.append_variable('NAME', self._binary)
self.append_variable('SRC', '$(wildcard *.%s)' % (self._extension))
self.append_separator()
# optional input
self.append_variable('CPPFLAGS')
self.append_variable('LDFLAGS')
self.append_variable(self._compiler_flags_var, self._compiler_flags)
self.append_separator()
self.append_variable(self._compiler_var, self._compiler)
self.append_separator()
# make use of implicit rules
self.append_variable('OBJ', '$(SRC:.%s=.o)' % (self._extension))
self.append_variable('DEP', '$(SRC:.%s=.d)' % (self._extension))
self.append_separator()
# first rule to be evaluated
self.append_static_rule('all', '$(NAME)')
self.append_separator()
# linkage
self.append_rule('$(NAME)', '$(OBJ)', [
'$(%s) -o $@ $^ $(LDFLAGS)' % (self._compiler_var)
])
self.append_separator()
# include dependencies
print('-include $(DEP)')
self.append_separator()
# rule to generate dependencies
self.append_rule('%.d', '%%.%s' % (self._extension), [
'$(%s) -MM $(CPPFLAGS) $(%s) $< -MF $@ -MT "$*.o $@"' %
(self._compiler_var, self._compiler_flags_var),
])
self.append_separator()
self.append_static_rule('clean', cmds=[
'$(RM) $(OBJ)',
'$(RM) $(NAME)',
])
self.append_separator()
self.append_static_rule('mrproper', 'clean', [
'$(RM) $(DEP)',
])
self.append_separator()
self.append_static_rule('distclean', 'mrproper', [
'$(RM) $(addsuffix ~,$(SRC))',
'$(RM) $(wildcard $(addsuffix .sw*,$(addprefix .,$(SRC))))',
])
self.append_separator()
# phony rule
self.append_rule('.PHONY', ' '.join(self.phony))
class makefile_generator_c(makefile_generator):
def __init__(self):
self._compiler_var = 'CC'
self._compiler_flags_var = 'CFLAGS'
self._compiler = 'gcc'
self._compiler_flags = '-W -Wall -Wextra -std=gnu99'
self._extension = 'c'
super().__init__()
class makefile_generator_cpp(makefile_generator):
def __init__(self):
self._compiler_var = 'CXX'
self._compiler_flags_var = 'CXXFLAGS'
self._compiler = 'g++'
self._compiler_flags = '-W -Wall -Wextra -Weffc++'
self._extension = 'cpp'
super().__init__()
import sys
def usage(prgname):
print("Usage: %s C" % (prgname), file=sys.stderr)
print(" %s c" % (prgname), file=sys.stderr)
print(" %s C++" % (prgname), file=sys.stderr)
print(" %s c++" % (prgname), file=sys.stderr)
def main():
if len(sys.argv) < 2:
usage(sys.argv[0])
return
if sys.argv[1] == 'c' or sys.argv[1] == 'C':
generator = makefile_generator_c()
elif sys.argv[1] == 'c++' or sys.argv[1] == 'C++':
generator = makefile_generator_cpp()
else:
usage(sys.argv[0])
return
generator.gen()
if __name__ == '__main__':
main()
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