How to build a C program using a custom version of glibc and static linking?

Solution 1:

Following a couple of suggestions from the glibc help mailing list ([email protected]), I have a solution. It turns out that this task is a bit tricky because you have to tell the linker to omit everything it would normally include automatically (and silently), and then include back everything that it needs, including a bunch of start and end files. Some of the start and end files come from libc and some come from gcc, so the make rule is a bit complicated. Below is a general sample makefile to illustrate the approach. I will assume that you are building a program called prog from a source file called prog.c and that you have installed your custom glibc in directory /home/my_acct/glibc_install.

TARGET = prog
OBJ = $(TARGET).o
SRC = $(TARGET).c
CC = gcc
CFLAGS = -g
LDFLAGS = -nostdlib -nostartfiles -static
GLIBCDIR = /home/my_acct/glibc_install/lib
STARTFILES = $(GLIBCDIR)/crt1.o $(GLIBCDIR)/crti.o `gcc --print-file-name=crtbegin.o`
ENDFILES = `gcc --print-file-name=crtend.o` $(GLIBCDIR)/crtn.o
LIBGROUP = -Wl,--start-group $(GLIBCDIR)/libc.a -lgcc -lgcc_eh -Wl,--end-group

$(TARGET): $(OBJ)
        $(CC) $(LDFLAGS) -o $@ $(STARTFILES) $^ $(LIBGROUP) $(ENDFILES) 

$(OBJ): $(SRC)
        $(CC) $(CFLAGS) -c $^

clean:
        rm -f *.o *.~ $(TARGET)

Solution 2:

You command line is just bogus. Try:

gcc -nodefaultlibs -static -L~/GLIBC/glibc_install/lib -o myprog myprog.c -lgcc -lc -lgcc -lc

or similar. You omitted -lc, and also erroneously had your libraries before your input files.

And you were searching for a library called libibgcc rather than libgcc...