View Compilation Error

195464_0_25395.c:16: error: syntax error before "isl"
195464_0_25395.c: In function `isl':
195464_0_25395.c:18: error: `true' undeclared (first use in this function)
195464_0_25395.c:18: error: (Each undeclared identifier is reported only once
195464_0_25395.c:18: error: for each function it appears in.)
195464_0_25395.c:18: error: `false' undeclared (first use in this function)