Compile rtf2latex2e on Linux

The last version of rtf2latex2e, a small C program stop compiling under Linux. It produces the error: root@paulo-Aspire-X3910:/tmp/rtf2latex2e-2-2-1# make gcc -DUNIX src/cole.o src/cole_decode.o src/cole_support.o src/eqn.o src/main.o src/mygetopt.o src/reader.o src/tokenscan.o src/writer.o src/init.o -o rtf2latex2e src/writer.o: In function `IncludeGraphics': writer.c:(.text+0x4a75): undefined reference to `roundf' writer.c:(.text+0x4a94): undefined reference to `roundf' writer.c:(.text+0x4b43): undefined reference to `roundf' writer.c:(.text+0x4b6e): undefined reference to `roundf' writer.c:(.text+0x4b99): undefined reference to `roundf' src/writer.o:writer.c:(.text+0x4bc4): more undefined references to `roundf' follow collect2: error: ld returned 1 exit status make: *** [rtf2latex2e] Error 1 on a fresh installation of Ubuntu 12.04. I would like to make the changes to it to make it compile. The software can be found here: [login to view URL] and the latest version for Unix here: [login to view URL] Paulo Ney de Souza