c++ - g++ insists <cmath> doesn't exist? -


so, re-installed windows, , trying set again, i'm trying re-compile code worked pre-reinstall. i'm having trouble fact upon compilation, errors implying don't have standard libraries:

g++ -c -wall -g -v src/main.cpp -o src/main.o using built-in specs. collect_gcc=c:\mingw\bin\g++.exe target: mingw32 configured with: ../gcc-4.8.1/configure --prefix=/mingw --host=mingw32 --build=mingw32 --without-pic --enable-shared --enable-static --with-gnu-ld --enable-lto --enable-libssp --disable-multilib --enable-languages=c,c++,fortran,objc,obj-c++,ada --disable-sjlj-exceptions --with-dwarf2 --disable-win32-registry --enable-libstdcxx-debug --enable-version-specific-runtime-libs --with-gmp=/usr/src/pkg/gmp-5.1.2-1-mingw32-src/bld --with-mpc=/usr/src/pkg/mpc-1.0.1-1-mingw32-src/bld --with-mpfr= --with-system-zlib --with-gnu-as --enable-decimal-float=yes --enable-libgomp --enable-threads --with-libiconv-prefix=/mingw32 --with-libintl-prefix=/mingw thread model: win32 gcc version 4.8.1 (gcc)  collect_gcc_options='-c' '-wall' '-g' '-v' '-o' 'src/main.o' '-shared-libgcc' '-mtune=generic' '-march=pentiumpro'  c:/mingw/bin/../libexec/gcc/mingw32/4.8.1/cc1plus.exe -quiet -v -iprefix c:\mingw\bin\../lib/gcc/mingw32/4.8.1/ src/main.cpp -quiet -dumpbase main.cpp -mtune=generic -march=pentiumpro -auxbase-strip src/main.o -g -wall -version -o c:\users\maphrox\appdata\local\temp\ccs1atrn.s gnu c++ (gcc) version 4.8.1 (mingw32)     compiled gnu c version 4.8.1, gmp version 5.1.2, mpfr version 3.1.2, mpc version 1.0.1 ggc heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072 ignoring nonexistent directory "c:\mingw\bin\../lib/gcc/mingw32/4.8.1/include/c++" ignoring nonexistent directory "c:\mingw\bin\../lib/gcc/mingw32/4.8.1/include/c++/mingw32" ignoring nonexistent directory "c:\mingw\bin\../lib/gcc/mingw32/4.8.1/include/c++/backward" ignoring nonexistent directory "c:/mingw/lib/gcc/../../lib/gcc/mingw32/4.8.1/include/c++" ignoring nonexistent directory "c:/mingw/lib/gcc/../../lib/gcc/mingw32/4.8.1/include/c++/mingw32" ignoring nonexistent directory "c:/mingw/lib/gcc/../../lib/gcc/mingw32/4.8.1/include/c++/backward" ignoring duplicate directory "c:/mingw/lib/gcc/../../lib/gcc/mingw32/4.8.1/include" ignoring nonexistent directory "i:/p/giaw/mingw/include" ignoring nonexistent directory "/mingw/include" ignoring duplicate directory "c:/mingw/lib/gcc/../../lib/gcc/mingw32/4.8.1/include-fixed" ignoring duplicate directory "c:/mingw/lib/gcc/../../lib/gcc/mingw32/4.8.1/../../../../mingw32/include" ignoring nonexistent directory "/mingw/include" #include "..." search starts here: #include <...> search starts here:  c:\mingw\bin\../lib/gcc/mingw32/4.8.1/include  c:\mingw\bin\../lib/gcc/mingw32/4.8.1/../../../../include  c:\mingw\bin\../lib/gcc/mingw32/4.8.1/include-fixed  c:\mingw\bin\../lib/gcc/mingw32/4.8.1/../../../../mingw32/include end of search list. gnu c++ (gcc) version 4.8.1 (mingw32)     compiled gnu c version 4.8.1, gmp version 5.1.2, mpfr version 3.1.2, mpc version 1.0.1 ggc heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072 compiler executable checksum: e3b01b00b6cf2cc1dc95350e55dafc7d in file included c:\mingw\include\glm\glm.hpp:78:0,                  src/main.cpp:3: c:\mingw\include\glm\core/_fixes.hpp:29:17: fatal error: cmath: no such file or directory  #include <cmath>                  ^ compilation terminated.

any idea how fix this? i'm pretty sure cause of problem reinstalling windows.


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