start on makefile and fixing warnings and errors

Signed-off-by: Mattias Andrée <maandree@operamail.com>

1 files changed, 112 insertions, 0 deletions

diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..19cba87
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,112 @@
+# slibc — Yet another C library
+# Copyright © 2015  Mattias Andrée (maandree@member.fsf.org)
+# 
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+# 
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+# 
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+
+
+
+# Flags required at compilation of a libc, specifying that unhosted C is used.
+CCFLAGS_UNHOSTED = -nostdinc -ffreestanding
+
+# Preprocessor flags defined by slibc that are required to build the slibc.
+CCFLAGS_SLIBC_DEFS = -D_SLIBC_SOURCE=1 -D_GNU_SOURCE=1 -D_BSD_SOURCE=1 -D_SLIBC_SUPPRESS_WARNINGS=1 \
+                     -D_POSIX_C_SOURCE=999999L -D_XOPEN_SOURCE=9999
+
+# Flag that specifies which C dialect the library is written.
+CCFLAGS_CSTD = -std=gnu11
+
+# Flags that specify where the system header files (that would in this case
+# be this library's header files) are located.
+CCFLAGS_INCLUDES = -Iinclude
+
+# Optimisation flags.
+CCFLAGS_OPTIIMISE = -Og -g
+
+# Warning flags.
+CCFLAGS_WARNINGS = -Wall -Wextra -Wdouble-promotion -Wformat=2 -Winit-self -Wmissing-include-dirs \
+                   -Wtrampolines -Wfloat-equal -Wshadow -Wmissing-prototypes -Wmissing-declarations \
+                   -Wredundant-decls -Wnested-externs -Winline -Wno-variadic-macros -Wsign-conversion \
+                   -Wswitch-default -Wconversion -Wsync-nand -Wunsafe-loop-optimizations -Wcast-align \
+                   -Wstrict-overflow -Wdeclaration-after-statement -Wundef -Wbad-function-cast \
+                   -Wcast-qual -Wwrite-strings -Wlogical-op -Waggregate-return -Wstrict-prototypes \
+                   -Wold-style-definition -Wpacked -Wvector-operation-performance \
+                   -Wunsuffixed-float-constants -Wsuggest-attribute=const -Wsuggest-attribute=noreturn \
+                   -Wsuggest-attribute=pure -Wsuggest-attribute=format -Wnormalized=nfkc
+# -pedantic is excluded.
+
+
+# All flags used required when compiling the library.
+CCFLAGS_COMMON = $(CCFLAGS_UNHOSTED) $(CCFLAGS_SLIBC_DEFS) $(CCFLAGS_CSTD) $(CCFLAGS_INCLUDES) \
+                 $(CCFLAGS_OPTIIMISE) $(CCFLAGS_WARNINGS)
+CCFLAGS_COMMON += $(CPPFLAGS) $(CFLAGS)
+CCFLAGS_STATIC = $(CCFLAGS_COMMON)
+CCFLAGS_SHARED = $(CCFLAGS_COMMON) -fPIC -DSHARED
+
+# Flags required when genering header file dependency list.
+MMFLAGS = $(CCFLAGS_COMMON) -MG
+
+
+# Object files to build.
+OBJECTS = $(shell find src | grep '\.c$$' | sed -e 's:^src/:obj/:' -e 's:\.c$$:\.o:')
+
+
+
+# You may add config.mk to the topmost directory
+# to change any configurations above.
+-include config.mk
+
+# The default rule.
+.PHONY: default
+default: all
+
+# Include list of file dependencies for object files.
+include obj/deps.mk
+
+
+
+
+# Build everything.
+.PHONY: all
+all: $(OBJECTS)
+	@echo $^
+
+
+# Build object file.
+obj/%.o:
+	@mkdir -p $$(dirname $@)
+	$(CC) -c -o $@ src/$*.c $(CCFLAGS_SHARED)
+
+
+
+
+
+# Generate list of file dependencies for object files.
+obj/deps.mk: Makefile
+	@mkdir -p obj
+	find src | grep '\.c$$' | xargs $(CC) -MM $(MMFLAGS) > $@
+	sed -i 's#^[^ :]*\.o: src\([^ ]*\)/[^ /]*\.c#obj\1/&#' $@
+
+
+
+# Clean generated files.
+.PHONY: clean
+clean:
+	-rm -rf obj bin
+
+# Remove all files that are not part of the source.
+.PHONY: distclean
+distclean: clean
+	-rm -f config.mk
+