Hi, I'm trying to compile a program that uses the cmath functions. I've been looking for about a week for a solutino to this problem, so hopefully someone will have a hint. Here's a partial output from gcc: Any ideas as to whjat might cause this? thanks, wes CompileC "build/FLTK Test.build/FLTK Test.build/Objects-normal/ppc/main.o" main.cpp normal ppc c++ com.apple.compilers.gcc.3_3 cd "/Users/na/Programming/FLTK Test" /usr/bin/gcc-3.3 -x c++ -arch ppc -pipe -Wno-trigraphs -fasm-blocks -fpascal-strings -g -O0 -mtune=G4 -fmessage-length=0 -ffix-and-continue -fzero-link "-F/Users/na/Programming/FLTK Test/build" "-I/Users/na/Programming/FLTK Test/build/include" -I/sw/include "-I/Users/na/Programming/FLTK Test/build/FLTK Test.build/FLTK Test.build/DerivedSources" "-Wp,-header-mapfile,/Users/na/Programming/FLTK Test/build/FLTK Test.build/FLTK Test.build/FLTK Test.hmap" -c "/Users/na/Programming/FLTK Test/main.cpp" -o "/Users/na/Programming/FLTK Test/build/FLTK Test.build/FLTK Test.build/Objects-normal/ppc/main.o" In file included from /usr/include/gcc/darwin/3.3/c++/bits/locale_facets.tcc:41, from /usr/include/gcc/darwin/3.3/c++/locale:47, from /usr/include/gcc/darwin/3.3/c++/bits/ostream.tcc:37, from /usr/include/gcc/darwin/3.3/c++/ostream:515, from /usr/include/gcc/darwin/3.3/c++/iterator:70, from /sw/include/Magick++/STL.h:15, from /sw/include/Magick++.h:11, from /Users/na/Programming/FLTK Test/main.cpp:6: /usr/include/gcc/darwin/3.3/c++/cmath: In function `float std::acos(float)': /usr/include/gcc/darwin/3.3/c++/cmath:102: error: `::acos' undeclared (first use here) /usr/include/gcc/darwin/3.3/c++/cmath: At global scope: /usr/include/gcc/darwin/3.3/c++/cmath:105: error: `acos' not declared /usr/include/gcc/darwin/3.3/c++/cmath: In function `long double std::acos(long double)': /usr/include/gcc/darwin/3.3/c++/cmath:112: error: `long double std::acos(long double)' used prior to declaration /usr/include/gcc/darwin/3.3/c++/cmath:112: error: `::acos' undeclared (first use here) /usr/include/gcc/darwin/3.3/c++/cmath: At global scope: /usr/include/gcc/darwin/3.3/c++/cmath:115: error: `asin' not declared