view Modules/python.c @ 73323:dad02a080bbc

Improve byte-compilation in packaging to be independent of -O or -B. The code I fixed to comply with PEP 3147 still had one bug: When run under python -O, some paths for pyc files would be pyo, because I called imp.cache_from_source without explicit debug_override argument in some places, and under -O that would return .pyo (this is well explained in the imp docs). Now all code (util.byte_compile, build_py, install_lib) can create .pyo files according to options given by users, without interference from the calling Python’s own optimize mode. On a related topic, I also removed the code that prevented byte compilation under python -B. The rationale is that packaging gives control over the creation of pyc files to the user with its own explicit option, and the behavior should not be changed if the calling Python happens to run with -B for whatever reason. I will argue that this is a bug fix and ask to be allowed to backport this change to distutils. Finally, I moved one nugget of information about the --compile and --optimize options from the source into the doc. It clears up a misunderstanding that I (and maybe other people) had.
author Éric Araujo <merwok@netwok.org>
date Thu, 03 Nov 2011 05:08:28 +0100
parents 3c9232a684ae
children 3b17210f34d9
line wrap: on
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/* Minimal main program -- everything is loaded from the library */

#include "Python.h"
#include <locale.h>

#ifdef __FreeBSD__
#include <floatingpoint.h>
#endif

#ifdef MS_WINDOWS
int
wmain(int argc, wchar_t **argv)
{
    return Py_Main(argc, argv);
}
#else

#ifdef __APPLE__
extern wchar_t* _Py_DecodeUTF8_surrogateescape(const char *s, Py_ssize_t size);
#endif

int
main(int argc, char **argv)
{
    wchar_t **argv_copy = (wchar_t **)PyMem_Malloc(sizeof(wchar_t*)*argc);
    /* We need a second copies, as Python might modify the first one. */
    wchar_t **argv_copy2 = (wchar_t **)PyMem_Malloc(sizeof(wchar_t*)*argc);
    int i, res;
    char *oldloc;
    /* 754 requires that FP exceptions run in "no stop" mode by default,
     * and until C vendors implement C99's ways to control FP exceptions,
     * Python requires non-stop mode.  Alas, some platforms enable FP
     * exceptions by default.  Here we disable them.
     */
#ifdef __FreeBSD__
    fp_except_t m;

    m = fpgetmask();
    fpsetmask(m & ~FP_X_OFL);
#endif
    if (!argv_copy || !argv_copy2) {
        fprintf(stderr, "out of memory\n");
        return 1;
    }
    oldloc = strdup(setlocale(LC_ALL, NULL));
    setlocale(LC_ALL, "");
    for (i = 0; i < argc; i++) {
#ifdef __APPLE__
        argv_copy[i] = _Py_DecodeUTF8_surrogateescape(argv[i], strlen(argv[i]));
#else
        argv_copy[i] = _Py_char2wchar(argv[i], NULL);
#endif
        if (!argv_copy[i])
            return 1;
        argv_copy2[i] = argv_copy[i];
    }
    setlocale(LC_ALL, oldloc);
    free(oldloc);
    res = Py_Main(argc, argv_copy);
    for (i = 0; i < argc; i++) {
        PyMem_Free(argv_copy2[i]);
    }
    PyMem_Free(argv_copy);
    PyMem_Free(argv_copy2);
    return res;
}
#endif