GNU ld can do that on ELF platforms. Here is how to do it with a linker version script: /* foo.c */ int foo() { return 42; } int bar() { return foo() + 1; } int baz() { return bar() – 1; } gcc -fPIC -shared -o libfoo.so foo.c && nm -D libfoo.so | … Read more
You can use -links if your filesystem is POSIX compliant (i.e. a directory has a link for each subdirectory in it, a link from its parent and a link to itself, thus a count of 2 links if it has no subdirectories). The following command should do what you want: find dir -type d -links … Read more
First of all, you are looking at the contents of a variable that is named after the current path, which is probably not what you want. A simple environment variable reference is $(name) or ${name}, not $(${name}). Due to this, line 13 is always evaluated. Second, I think it is choking on the indentation of … Read more
You can set the stack size programmatically with setrlimit, e.g. #include <sys/resource.h> int main (int argc, char **argv) { const rlim_t kStackSize = 16 * 1024 * 1024; // min stack size = 16 MB struct rlimit rl; int result; result = getrlimit(RLIMIT_STACK, &rl); if (result == 0) { if (rl.rlim_cur < kStackSize) { rl.rlim_cur … Read more
Its the implementation of Standard C library described in C standards plus some extra useful stuffs which are not strictly standard but used frequently. Its main contents are : 1) C library described in ANSI,c99,c11 standards. It includes macros, symbols, function implementations etc.(printf(),malloc() etc) 2) POSIX standard library. The “userland” glue of system calls. (open(),read() … Read more
If you use sprintf() or vsprintf(), you need to allocate a buffer first, and you need to be sure that the buffer is large enough to contain what sprintf writes. Otherwise sprintf() will happily overwrite whatever memory lies beyond the end of the buffer. char* x = malloc(5 * sizeof(char)); // writes “123456” +null but … Read more
As I remember it I had some trouble with the straight load command too, so I switched to “flash write_image erase my_project.hex 0 ihex” .. obviously I was using hex files but it looks like elf files should work to, see http://openocd.org/doc/html/Flash-Commands.html … the good thing about this command is it also erases only the … Read more
For grins, I just traced down how argv[0] is used from within gcc (main.c -> top_lev.c -> opts.c -> langhooks.c) and it appears that argv[0] is currently used for nothing more than giving malloc something to report when it fails. There doesn’t appear to be any behavior change if argv[0] is anything other than gcc.
Disabling the built-in rules is done by writing an empty rule for .SUFFIXES: .SUFFIXES: Having erased the built-in rules, I’m not sure that erasing the built-in variables helps you much more than just remembering to set them yourself or not use them, but you could use something like $(foreach V, $(shell make -p -f/dev/null 2>/dev/null … Read more
OS X sed handles the -i argument differently to the Linux version. You can generate a command that might “work” for both by adding -e in this way: # vv sed -i -e ‘s|\(.*\)\.o:|$(OBJ_DIR)/\1.o $(OBJ_DIR)/\1.d $(TEST_OBJ_DIR)/\1_utest.o:|’ $@ OS X sed -i interprets the next thing after the -i as a file extension for a backup … Read more