🚀 go-pugleaf

/*
 * To reproduce: use -g option and nested ({...})-`block expressions'
 * Configuration: gcc-1.35/sun4-os4 with rms' loop.c virtual memory fix
 * Symptom: loader complains of undefined compiler generated externals
 * 
 * % gcc -v -g m.c
 * gcc version 1.35
 * /p/lib/gcc-cpp -v -undef -D__GNUC__ -Dsparc -Dsun -Dunix -D__sparc__ -D__sun__ -D__unix__ m.c /tmp/cca19722.cpp
 * GNU CPP version 1.35
 * /p/lib/gcc-cc1 /tmp/cca19722.cpp -quiet -dumpbase m.c -g -version -o /tmp/cca19722.s
 * GNU C version 1.35 (sparc) compiled by GNU C version 1.35.
 * as -o m.o /tmp/cca19722.s
 * ld -e start -dc -dp -Bstatic /lib/crt0.o m.o /p/lib/gcc-gnulib -lg -lc
 * Undefined:
 * LBE5
 * LBB5
 * % 
*/
#define MAX(a,b) ({ \
    __typeof(a) _a = (a); \
    __typeof(b) _b = (b); \
    (_a > _b) ? _a : _b; \
    })
#define COPYSIGN(a,b) ({ \
    __typeof(a) _a = (a); \
    __typeof(b) _b = (b); \
    (_b < 0) \
       ? ((_a > 0) ? -(_a) : _a) \
       : ((_a < 0) ? -(_a) : _a) ; \
    })
void
main()
{
    int x;
    x = COPYSIGN(MAX(0,0),0);
}
--
Jim Meyering      meyering@cs.utexas.edu