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atlas-probe: Fix compilation with gcc11 

This uses some definitions from <sys/cdefs.h> in gcc 8.4.0, not present
in musl or gcc11.

Also use clock_gettime() instead of syscall(__NR_clock_gettime,...),
which is not currently defined.

Signed-off-by: Eneas U de Queiroz <cotequeiroz@gmail.com>
This commit is contained in:
Eneas U de Queiroz 2021-10-07 16:50:04 -03:00 committed by Rosen Penev
parent f263ed4449
commit 281df4bcf5
3 changed files with 188 additions and 0 deletions
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74
net/atlas-probe/patches/002-Avoid-problems-with-64-bit-time_t.patch Normal file
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@ -0,0 +1,74 @@
From b83524b19ca6e5e58dded77fad37f17a177766ff Mon Sep 17 00:00:00 2001
From: Eneas U de Queiroz <cotequeiroz@gmail.com>
Date: Fri, 8 Oct 2021 14:39:52 -0300
Subject: [PATCH 1/2] Avoid problems with 64-bit time_t
The clock_gettime() calls are being handled by calling
syscall(__NR_clock_gettime, ...), which is not portable between systems
using 32-bit and 64-bit time_t. This is being done to avoid having to
link agains librt.
So, use the standard function, and add a test to see if we can compile
a test without the library, including it otherwise.
Signed-off-by: Eneas U de Queiroz <cotequeiroz@gmail.com>
--- a/Makefile.flags
+++ b/Makefile.flags
@@ -124,6 +124,12 @@ CFLAGS += --sysroot=$(CONFIG_SYSROOT)
export SYSROOT=$(CONFIG_SYSROOT)
endif
+# glibc versions before 2.17 need to link with -rt to use clock_gettime
+RT_NEEDED := $(shell echo -e '#include <time.h>\nint main(void){struct timespec tp; return clock_gettime(CLOCK_MONOTONIC, &tp);}' >rttest.c; $(CC) $(CFLAGS) -o /dev/null rttest.c >/dev/null 2>&1 || echo "y"; rm rttest.c)
+ifeq ($(RT_NEEDED),y)
+LDLIBS += rt
+endif
+
# Android has no separate crypt library
# gcc-4.2.1 fails if we try to feed C source on stdin:
# echo 'int main(void){return 0;}' | $(CC) $(CFLAGS) -lcrypt -o /dev/null -xc -
--- a/coreutils/date.c
+++ b/coreutils/date.c
@@ -37,7 +37,7 @@
//config:config FEATURE_DATE_NANO
//config: bool "Support %[num]N nanosecond format specifier"
//config: default n
-//config: depends on DATE # syscall(__NR_clock_gettime)
+//config: depends on DATE # clock_gettime()
//config: select PLATFORM_LINUX
//config: help
//config: Support %[num]N format specifier. Adds ~250 bytes of code.
@@ -265,9 +265,7 @@ int date_main(int argc UNUSED_PARAM, cha
#endif
} else {
#if ENABLE_FEATURE_DATE_NANO
- /* libc has incredibly messy way of doing this,
- * typically requiring -lrt. We just skip all this mess */
- syscall(__NR_clock_gettime, CLOCK_REALTIME, &ts);
+ clock_gettime(CLOCK_REALTIME, &ts);
#else
time(&ts.tv_sec);
#endif
--- a/libbb/time.c
+++ b/libbb/time.c
@@ -243,7 +243,7 @@ char* FAST_FUNC strftime_YYYYMMDDHHMMSS(
* typically requiring -lrt. We just skip all this mess */
static void get_mono(struct timespec *ts)
{
- if (syscall(__NR_clock_gettime, CLOCK_MONOTONIC, ts))
+ if (clock_gettime(CLOCK_MONOTONIC, ts))
bb_error_msg_and_die("clock_gettime(MONOTONIC) failed");
}
unsigned long long FAST_FUNC monotonic_ns(void)
--- a/runit/runsv.c
+++ b/runit/runsv.c
@@ -55,7 +55,7 @@ ADVISED OF THE POSSIBILITY OF SUCH DAMAG
* typically requiring -lrt. We just skip all this mess */
static void gettimeofday_ns(struct timespec *ts)
{
- syscall(__NR_clock_gettime, CLOCK_REALTIME, ts);
+ clock_gettime(CLOCK_REALTIME, ts);
}
#else
static void gettimeofday_ns(struct timespec *ts)

82
net/atlas-probe/patches/003-Fix-compilation-with-gcc11.patch Normal file
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From b6b3cdc16eaa50b40623f1589ea51dd43ebb456d Mon Sep 17 00:00:00 2001
From: Eneas U de Queiroz <cotequeiroz@gmail.com>
Date: Fri, 8 Oct 2021 14:47:08 -0300
Subject: [PATCH 2/2] Fix compilation with gcc11
Currently, libbb.h counts on __THROW and __inline being defined. They
are internal macros used by glibc not meant to be publicly used. This
causes trouble, at least with a combination of gcc11 and musl, where
nether have them defined.
Use definitions from <sys/cdefs.h> in gcc 8.4.0 if they're missing.
Signed-off-by: Eneas U de Queiroz <cotequeiroz@gmail.com>
--- a/include/libbb.h
+++ b/include/libbb.h
@@ -120,6 +120,65 @@
#ifdef DMALLOC
# include <dmalloc.h>
#endif
+
+/* Compatibility with musl & gcc 11. Taken from <sys/cdefs.h> in gcc 8.4.0 */
+#ifndef __THROW
+#ifdef __GNUC__
+
+/* All functions, except those with callbacks or those that
+ synchronize memory, are leaf functions. */
+# if __GNUC_PREREQ (4, 6) && !defined _LIBC
+# define __LEAF , __leaf__
+# define __LEAF_ATTR __attribute__ ((__leaf__))
+# else
+# define __LEAF
+# define __LEAF_ATTR
+# endif
+
+/* GCC can always grok prototypes. For C++ programs we add throw()
+ to help it optimize the function calls. But this works only with
+ gcc 2.8.x and egcs. For gcc 3.2 and up we even mark C functions
+ as non-throwing using a function attribute since programs can use
+ the -fexceptions options for C code as well. */
+# if !defined __cplusplus && __GNUC_PREREQ (3, 3)
+# define __THROW __attribute__ ((__nothrow__ __LEAF))
+# define __THROWNL __attribute__ ((__nothrow__))
+# define __NTH(fct) __attribute__ ((__nothrow__ __LEAF)) fct
+# else
+# if defined __cplusplus && __GNUC_PREREQ (2,8)
+# define __THROW throw ()
+# define __THROWNL throw ()
+# define __NTH(fct) __LEAF_ATTR fct throw ()
+# else
+# define __THROW
+# define __THROWNL
+# define __NTH(fct) fct
+# endif
+# endif
+
+#else /* Not GCC. */
+
+# define __inline /* No inline functions. */
+
+# define __THROW
+# define __THROWNL
+# define __NTH(fct) fct
+
+#endif /* GCC. */
+#endif /* __THROW */
+
+#ifndef __nonnull
+/* The nonull function attribute allows to mark pointer parameters which
+ must not be NULL. */
+#if __GNUC_PREREQ (3,3)
+# define __nonnull(params) __attribute__ ((__nonnull__ params))
+#else
+# define __nonnull(params)
+#endif
+#endif /* __nonnull */
+
+/* End of compatibility with musl & gcc 11. */
+
/* Just in case libc doesn't define some of these... */
#ifndef _PATH_PASSWD
#define _PATH_PASSWD "/etc/passwd"

32
net/atlas-probe/patches/004-Comment-out-librt-testing.patch Normal file
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From df50c29210f18f959186bb974c33cefff2bcc15e Mon Sep 17 00:00:00 2001
From: Eneas U de Queiroz <cotequeiroz@gmail.com>
Date: Fri, 8 Oct 2021 22:34:37 -0300
Subject: [PATCH] Comment out librt testing
The packages feed Ci is apparently failing to execute the test:
Makefile.flags:128: *** unterminated call to function 'shell':
missing ')'. Stop.
The call appears to be correct, but we already know that the library
will not be needed for openwrt, so let's just leave it out.
Signed-off-by: Eneas U de Queiroz <cotequeiroz@gmail.com>
--- a/Makefile.flags
+++ b/Makefile.flags
@@ -125,10 +125,10 @@ export SYSROOT=$(CONFIG_SYSROOT)
endif
# glibc versions before 2.17 need to link with -rt to use clock_gettime
-RT_NEEDED := $(shell echo -e '#include <time.h>\nint main(void){struct timespec tp; return clock_gettime(CLOCK_MONOTONIC, &tp);}' >rttest.c; $(CC) $(CFLAGS) -o /dev/null rttest.c >/dev/null 2>&1 || echo "y"; rm rttest.c)
-ifeq ($(RT_NEEDED),y)
-LDLIBS += rt
-endif
+#RT_NEEDED := $(shell echo -e '#include <time.h>\nint main(void){struct timespec tp; return clock_gettime(CLOCK_MONOTONIC, &tp);}' >rttest.c; $(CC) $(CFLAGS) -o /dev/null rttest.c >/dev/null 2>&1 || echo "y"; rm rttest.c)
+#ifeq ($(RT_NEEDED),y)
+#LDLIBS += rt
+#endif
# Android has no separate crypt library
# gcc-4.2.1 fails if we try to feed C source on stdin: