From 57fd993799a2b081c826f6fc8def32d28d526bfb Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?J=C3=A9r=C3=A9mie=20Galarneau?= Date: Tue, 17 Jan 2023 16:57:35 -0500 Subject: [PATCH] compat: off64_t is not defined by musl MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit This helps compile with latest musl, where off64_t is not defined unless _LARGEFILE64_SOURCE is defined. On glibc, _LARGEFILE64_SOURCE is defined if _GNU_SOURCE is defined, so the problem is only seen with musl. Since the project uses AC_SYS_LARGEFILE, which from the autoconf doc: "arrange for 64-bit file offsets, known as large-file support." As such, it is safe to assume off_t is 64-bit wide. This is checked by a static_assert to catch any platform where autoconf would let a 32-bit off_t slip. Reported-by: Khem Raj Signed-off-by: Jérémie Galarneau Change-Id: If2c6007a8c85bc3f3065002af8a7538b882fb4a8 --- src/common/compat/compat-fcntl.cpp | 2 +- src/common/compat/fcntl.hpp | 11 +++++------ 2 files changed, 6 insertions(+), 7 deletions(-) --- a/src/common/compat/compat-fcntl.c +++ b/src/common/compat/compat-fcntl.c @@ -13,7 +13,7 @@ #ifdef __linux__ LTTNG_HIDDEN -int compat_sync_file_range(int fd, off64_t offset, off64_t nbytes, +int compat_sync_file_range(int fd, off_t offset, off_t nbytes, unsigned int flags) { #ifdef HAVE_SYNC_FILE_RANGE --- a/src/common/compat/fcntl.h +++ b/src/common/compat/fcntl.h @@ -8,21 +8,21 @@ #ifndef _COMPAT_FCNTL_H #define _COMPAT_FCNTL_H +#include #include #include #include -#if (defined(__CYGWIN__)) -typedef long long off64_t; -#endif +static_assert(sizeof(off_t) == sizeof(int64_t), + "Build system is misconfigured, off_t must be 64-bit wide"); #if (defined(__FreeBSD__) || defined(__sun__)) typedef off64_t loff_t; #endif #ifdef __linux__ -extern int compat_sync_file_range(int fd, off64_t offset, off64_t nbytes, +extern int compat_sync_file_range(int fd, off_t offset, off_t nbytes, unsigned int flags); #define lttng_sync_file_range(fd, offset, nbytes, flags) \ compat_sync_file_range(fd, offset, nbytes, flags) @@ -37,8 +37,8 @@ extern int compat_sync_file_range(int fd #define SYNC_FILE_RANGE_WAIT_BEFORE 0 #define SYNC_FILE_RANGE_WRITE 0 -static inline int lttng_sync_file_range(int fd, off64_t offset, - off64_t nbytes, unsigned int flags) +static inline int lttng_sync_file_range(int fd, off_t offset, + off_t nbytes, unsigned int flags) { return -ENOSYS; }