From: Tobias Geerinckx-Rice <me@tobias.gr>
Date: Sat, 03 Oct 2020 22:10:20 +0200
Subject: gnu: clamav: Add support for system tomsfastmath.
Adjusted from the original for clamav 0.103.0:
From 756ff89526b5ffaa7a4f49b1bbecf2ecbd6f85f9 Mon Sep 17 00:00:00 2001
From: Andreas Cadhalpun <Andreas.Cadhalpun@googlemail.com>
Date: Wed, 11 Mar 2015 20:03:15 +0100
Subject: add support for system tomsfastmath
Patch-Name: add-support-for-system-tomsfastmath.patch
---
configure.ac | 2 ++
libclamav/Makefile.am | 10 ++++++++--
libclamav/bignum.h | 6 +++++-
libclamav/xdp.c | 2 +-
m4/reorganization/libs/tomsfastmath.m4 | 12 ++++++++++++
5 files changed, 28 insertions(+), 4 deletions(-)
create mode 100644 m4/reorganization/libs/tomsfastmath.m4
diff -Naur a/configure.ac b/configure.ac
--- a/configure.ac 1970-01-01 01:00:01.000000000 +0100
+++ b/configure.ac 2020-10-03 22:04:00.535448352 +0200
@@ -94,6 +94,7 @@
m4_include([m4/reorganization/libs/json.m4])
m4_include([m4/reorganization/libs/pcre.m4])
m4_include([m4/reorganization/libs/libmspack.m4])
+m4_include([m4/reorganization/libs/tomsfastmath.m4])
if test "x$use_internal_mspack" = "xno"; then
mspack_msg="External, $LIBMSPACK_CFLAGS $LIBMSPACK_LIBS"
@@ -361,6 +362,7 @@
fi
CL_MSG_STATUS([yara ],[$enable_yara],[$enable_yara])
CL_MSG_STATUS([fts ],[yes],[$lfs_fts_msg])
+CL_MSG_STATUS([tomsfastmath],[yes],[$tomsfastmath_msg])
# Yep, downgrading the compiler avoids the bug too:
diff -Naur a/libclamav/bignum.h b/libclamav/bignum.h
--- a/libclamav/bignum.h 1970-01-01 01:00:01.000000000 +0100
+++ b/libclamav/bignum.h 2020-10-03 22:04:00.535448352 +0200
@@ -1,9 +1,13 @@
#ifndef BIGNUM_H_
#define BIGNUM_H_
+#if HAVE_SYSTEM_TOMSFASTMATH
+#include <tfm.h>
+#else
#define TFM_CHECK
-
#include "bignum_fast.h"
+#endif
+
typedef fp_int mp_int;
#define mp_cmp fp_cmp
#define mp_toradix_n(a, b, c, d) fp_toradix_n(a, b, c, d)
diff -Naur a/libclamav/Makefile.am b/libclamav/Makefile.am
--- a/libclamav/Makefile.am 1970-01-01 01:00:01.000000000 +0100
+++ b/libclamav/Makefile.am 2020-10-03 22:06:42.705447754 +0200
@@ -588,8 +588,10 @@
yara_clam.h
endif
-libclamav_la_SOURCES += bignum.h\
- bignum_fast.h\
+libclamav_la_SOURCES += bignum.h
+
+if !SYSTEM_TOMSFASTMATH
+libclamav_la_SOURCES += bignum_fast.h\
tomsfastmath/addsub/fp_add.c\
tomsfastmath/addsub/fp_add_d.c\
tomsfastmath/addsub/fp_addmod.c\
@@ -671,6 +673,10 @@
tomsfastmath/sqr/fp_sqr_comba_generic.c\
tomsfastmath/sqr/fp_sqr_comba_small_set.c\
tomsfastmath/sqr/fp_sqrmod.c
+else
+libclamav_la_CFLAGS += $(TOMSFASTMATH_CFLAGS)
+libclamav_la_LIBADD += $(TOMSFASTMATH_LIBS)
+endif
.PHONY2: version.h.tmp
version.c: version.h
diff -Naur a/libclamav/xdp.c b/libclamav/xdp.c
--- a/libclamav/xdp.c 1970-01-01 01:00:01.000000000 +0100
+++ b/libclamav/xdp.c 2020-10-03 22:04:00.535448352 +0200
@@ -52,7 +52,7 @@
#include "scanners.h"
#include "conv.h"
#include "xdp.h"
-#include "bignum_fast.h"
+#include "bignum.h"
#include "filetypes.h"
static char *dump_xdp(cli_ctx *ctx, const char *start, size_t sz);
diff -Naur a/m4/reorganization/libs/tomsfastmath.m4 b/m4/reorganization/libs/tomsfastmath.m4
--- a/m4/reorganization/libs/tomsfastmath.m4 1970-01-01 01:00:00.000000000 +0100
+++ b/m4/reorganization/libs/tomsfastmath.m4 2020-10-03 22:04:00.535448352 +0200
@@ -0,0 +1,12 @@
+dnl Check for system tomsfastmath
+PKG_CHECK_MODULES([TOMSFASTMATH], [tomsfastmath], [have_system_tomsfastmath=yes], [have_system_tomsfastmath=no])
+
+AM_CONDITIONAL([SYSTEM_TOMSFASTMATH], [test "x$have_system_tomsfastmath" = "xyes"])
+
+if test "x$have_system_tomsfastmath" = "xyes"; then
+ AC_DEFINE([HAVE_SYSTEM_TOMSFASTMATH], [1], [link against system-wide tomsfastmath library])
+ tomsfastmath_msg="External, $TOMSFASTMATH_CFLAGS $TOMSFASTMATH_LIBS"
+else
+ AC_DEFINE([HAVE_SYSTEM_TOMSFASTMATH], [0], [don't link against system-wide tomsfastmath library])
+ tomsfastmath_msg="Internal"
+fi
