1From 695965c27be74acb5968f19d51af86065c4b71a9 Mon Sep 17 00:00:00 2001 2From: Hongxu Jia <hongxu.jia@windriver.com> 3Date: Mon, 13 May 2019 09:48:14 +0800 4Subject: [PATCH] support musl 5 6... 7|./lib/math.h:2877:1: error: 'int signbit(float)' conflicts with a previous declaration 8| _GL_MATH_CXX_REAL_FLOATING_DECL_2 (signbit) 9| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 10|In file included from recipe-sysroot/usr/include/c++/8.3.0/math.h:36, 11| from ./lib/math.h:27, 12| from ./src/include/driver.h:27, 13| from src/devices/grodvi/dvi.cpp:20: 14|recipe-sysroot/usr/include/c++/8.3.0/cmath:661:3: note: previous declaration 'constexpr bool std::signbit(float)' 15| signbit(float __x) 16| ^~~~~~~ 17... 18 19Upstream-Status: Backport [http://git.savannah.gnu.org/gitweb/?p=gnulib.git;a=commit;h=453ff940449bbbde9ec00f0bbf82a359c5598fc7] 20 21Signed-off-by: Hongxu Jia <hongxu.jia@windriver.com> 22--- 23 gnulib_m4/signbit.m4 | 2 ++ 24 1 file changed, 2 insertions(+) 25 26diff --git a/gnulib_m4/signbit.m4 b/gnulib_m4/signbit.m4 27index 9e7884d..8b9c70c 100644 28--- a/gnulib_m4/signbit.m4 29+++ b/gnulib_m4/signbit.m4 30@@ -31,6 +31,8 @@ AC_DEFUN([gl_SIGNBIT], 31 [case "$host_os" in 32 # Guess yes on glibc systems. 33 *-gnu* | gnu*) gl_cv_func_signbit="guessing yes" ;; 34+ # Guess yes on musl systems. 35+ *-musl*) gl_cv_func_signbit="guessing yes" ;; 36 # Guess yes on native Windows. 37 mingw*) gl_cv_func_signbit="guessing yes" ;; 38 # If we don't know, assume the worst. 39-- 402.7.4 41 42