C / C++ Forums on Bytes. Compiling this code tells me that there is no reference to pow() or sqrt(). 求助：undefined reference to `pow'#include #include int main(){ double a = 10.0,b = 3.0; yacc undefined reference to pow (3) undefined reference to `pow' because power to any number must have an integer value as power . otherwise you will get undefined reference to pow error, when you compile below program with no -lm option. How to solve when undefined reference to pow appears, Programmer Sought, the best programmer technical posts sharing site. You provided constants for both the inputs to pow, so I'm betting the compiler made an optimization and replaced the call with the literal value, or inlined pow for you, since pow(10,2) will always be the same value, and you didn't define pow in any way. Hello, I am experiencing some strange behaviour in Xilinx SDK 2018.2 with a Standalone OS project for A53. a=pow(2,p); b=p; c=1/(pow(2,p)); printf("%d %d %d", a,b,c);} return EXIT_SUCCESS;} But when I run it, I get two "undefined reference to pow" errors. Clang fails to compile Filament with a recently updated linux system. I tested this earlier with a simple "a=pow(2,3) printf("a") program and it worked fine, so what's going on now? 我的一个应用，用到了pow函数，也加了头文件了在linux环境下编译，然后我提示：undefined reference to `pow' 然后我就测试了一下，发现，如果pow(a,b),如果a，b都是常量时，是不会出现提示的，但是，如果a，b中有任何一个是变量，那么编译时都会出现提示。原因：因为math.h不是C运行库函数，就 … Weird thing is, that references to sqrt and powf do work. The book didn't tell me under which header these functions are located but "Undefined Reference" to pow and sqrt even though math.h header is there It's quick & easy. Upstream no longer maintains perl5.12 and MacPorts no longer ships it. You can still build Filament by adding -fno-builtin to you CXXFLAGS. home > topics > c / c++ > questions > undefined reference to 'pow()' using Post your question to a community of 468,028 developers. pow(x,y) where, x must be real and y must be a whole number Why does the following bit of code work in C: int res = pow(2, 3); printf("%d\n", res); while this other doesn't? When using the -ffast-math flag you'll run into errors like: undefined reference to __powf_finite. A #include file provides information to the compiler that is used to convert one source file into one object file. : undefined reference to `pow'. When we use the pow function or any other math functions from math header in c program on linux environment (RHEL, Fedora or CentOS), need to use -lm option for compilation. I get "undefined reference to pow" and "undefined reference to log" errors despite including math.h and linking to libm as well. C: undefined reference to `floor': Even though I am including the , gcc -lm foo.c /tmp/cc9xiNp2.o: In function `main': foo.c:(.text+0x24): undefined reference to `floor' collect2: error: ld returned 1 exit status. Not that MacPorts really support Linux, but if you would still like to compile perl5.22 from MacPorts on Linux, at least open a new ticket as this log is certainly no longer relevant after so many years.
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