gcc -pthread -fno-strict-aliasing -DNDEBUG -g -fwrapv -O2 -Wall -Wstrict-prototypes -g
-O2 -fPIC -g -I/usr/include/python2.7 -c src/llfuse.c -o
build/temp.gnukfreebsd-8.1-1-686-smp-i686-2.7/src/llfuse.o -D_FILE_OFFSET_BITS=64
-I/usr/include/fuse -DFUSE_USE_VERSION=28 -DLLFUSE_VERSION="0.33" -Werror -Wall
-Wextra -Wconversion -Wno-unused-parameter -Wno-sign-conversion
-Wno-unused-but-set-variable -fno-strict-aliasing
src/llfuse.c: In function '__pyx_f_6llfuse_fuse_mkdir':
src/llfuse.c:4693:50: error: conversion to 'mode_t' from 'int' may alter its
value [-Werror=conversion]
Now, llfuse.c is itself code generated by Cython, so it's hard to read.
However, the assignment that gcc complains about is just this:
static void __pyx_f_6llfuse_fuse_mkdir(fuse_req_t __pyx_v_req, fuse_ino_t
__pyx_v_parent, const char *__pyx_v_name, mode_t __pyx_v_mode) {
[....]
__pyx_v_mode = ((__pyx_v_mode & (~S_IFMT)) | S_IFDIR);
i.e., I'm making sure that the type bits of a mode_t variable are set to
S_IFDIR.
Why does this require a conversion in kFreeBSD?
It is roughly equal to this:
void foo(unsigned short int a)
{
a = (( a & (~0x1F)) | 0x10);
}
This code will warn also under Linux.
Please note "unsigned short" x "signed int" and "-Wconversion -Werror"
Petr
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