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# Filename: package/.../uclibc/140-math_decl.patch
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https://dev.openwrt.org/browser/trunk/toolchain/uClibc/patches-0.9.30.1/140-math_decl.patch
--- ./libc/sysdeps/linux/common/bits/mathcalls.h.orig
+++ ./libc/sysdeps/linux/common/bits/mathcalls.h
@@ -229,7 +229,7 @@
 
 
 /* Return nonzero if VALUE is not a number.  */
-__MATHDECL_PRIV (int,__isnan,, (_Mdouble_ __value), (__const__));
+__MATHDECL_PRIV (int,isnan,, (_Mdouble_ __value), (__const__));
 
 #if defined __USE_MISC || defined __USE_XOPEN
 /* Return nonzero if VALUE is not a number.  */