From 0d6b305e52fb57b831333afd68f44f2001c6fa15 Mon Sep 17 00:00:00 2001 From: Patrick Havelange Date: Tue, 22 Oct 2019 14:41:48 +0200 Subject: [PATCH] package/lxc: fix compilation with stub memfd_create This fixes compilation issue in case memfd_create is a stub in libc. Patch already merged in lxc master branch (344b8ee293f4d3730a70a6ccaa03d7e4a516ae95). Copy of the original commit log: In case the internal memfd_create has to be used, make sure we don't clash with the already existing memfd_create function from glibc. This can happen if this glibc function is a stub. In this case, at ./configure time, the test for this function will return false, however the declaration of that function is still available. This leads to compilation errors. Signed-off-by: Patrick Havelange Reviewed-by: Matt Weber Signed-off-by: Thomas Petazzoni --- ...-rename-internal-memfd_create-to-mem.patch | 43 +++++++++++++++++++ 1 file changed, 43 insertions(+) create mode 100644 package/lxc/0001-syscall_wrappers-rename-internal-memfd_create-to-mem.patch diff --git a/package/lxc/0001-syscall_wrappers-rename-internal-memfd_create-to-mem.patch b/package/lxc/0001-syscall_wrappers-rename-internal-memfd_create-to-mem.patch new file mode 100644 index 0000000000..6210591c09 --- /dev/null +++ b/package/lxc/0001-syscall_wrappers-rename-internal-memfd_create-to-mem.patch @@ -0,0 +1,43 @@ +From 2b23a1313f501423aecbe4ad4a988a9f6f832f1f Mon Sep 17 00:00:00 2001 +From: Patrick Havelange +Date: Tue, 22 Oct 2019 12:29:54 +0200 +Subject: [PATCH 1/1] syscall_wrappers: rename internal memfd_create to + memfd_create_lxc + +In case the internal memfd_create has to be used, make sure we don't +clash with the already existing memfd_create function from glibc. + +This can happen if this glibc function is a stub. In this case, at +./configure time, the test for this function will return false, however +the declaration of that function is still available. This leads to +compilation errors. + +Signed-off-by: Patrick Havelange +--- + src/lxc/syscall_wrappers.h | 3 ++- + 1 file changed, 2 insertions(+), 1 deletion(-) + +diff --git a/src/lxc/syscall_wrappers.h b/src/lxc/syscall_wrappers.h +index 42d94db..bddf01b 100644 +--- a/src/lxc/syscall_wrappers.h ++++ b/src/lxc/syscall_wrappers.h +@@ -59,7 +59,7 @@ static inline long __keyctl(int cmd, unsigned long arg2, unsigned long arg3, + #endif + + #ifndef HAVE_MEMFD_CREATE +-static inline int memfd_create(const char *name, unsigned int flags) { ++static inline int memfd_create_lxc(const char *name, unsigned int flags) { + #ifndef __NR_memfd_create + #if defined __i386__ + #define __NR_memfd_create 356 +@@ -98,6 +98,7 @@ static inline int memfd_create(const char *name, unsigned int flags) { + return -1; + #endif + } ++#define memfd_create memfd_create_lxc + #else + extern int memfd_create(const char *name, unsigned int flags); + #endif +-- +2.20.1 +