/usr/lib/fortc/common.m4 is in libxgks-dev 2.6.1+dfsg.2-3ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 | divert(-1)
define(`FC_NAME',`NAMEF($1)')
#
# diversion 1 is for collecting formal arguments
# diversion 2 is for extra formal arguments for string lengths
# diversion 3 is for formal argument declarations
# diversion 4 is for extra local variables derived from formal arguments
# diversion 5 is for prototype-style arguments
# diversion 6 is for extra prototype-style arguments
#
define(`STRING',`dnl
divert(1)ifdef(`INIT',,`, ')STRINGF(`$1')`'dnl
divert(2)STRINGX(`$1')`'dnl
divert(3)STRINGD(`$1')`'dnl
divert(4)STRINGL(`$1')`'dnl
divert(5)ifdef(`INIT',,`,')STRINGP(`$1')`'dnl
divert(6)STRINGPX(`$1')`'dnl
divert(0)undefine(`INIT')dnl
')dnl
#
#define(`STRING',`divert(1)ifdef(`INIT',,`, ')STRINGF(`$1')`'undefine(`INIT')divert(2)`'STRINGX(`$1')`'divert(3)`'STRINGD(`$1',`$2')`'divert(4)`'STRINGL(`$1')`'divert(5)`'translit(STRINGD(`$1',`$2'),`;',`,')divert(0)')dnl
#
define(`INTSTAR',`divert(1)ifdef(`INIT',,`, ')$1`'undefine(`INIT')divert(2)`'INTEGERX(`$1')`'divert(3)
int *$1;`'divert(0)')dnl
define(`FLOATSTAR',`divert(1)ifdef(`INIT',,`, ')$1`'undefine(`INIT')divert(2)`'REALX(`$1')`'divert(3)
float *$1;divert(0)')dnl
define(`DOUBLESTAR',`divert(1)ifdef(`INIT',,`, ')$1`'undefine(`INIT')divert(2)`'DOUBLEX(`$1')`'divert(3)
double *$1;divert(0)')dnl
define(`FUNCTION',`divert(1)ifdef(`INIT',,`, ')$2`'undefine(`INIT')divert(2)`'FUNCTIONX(`$2')`'divert(3)
$1 (*$2)();divert(0)')dnl
# The following is for a pointer to a single character, not a Fortran
# character variable
#
define(`CHARSTAR',`divert(1)ifdef(`INIT',,`, ')$1`'undefine(`INIT')divert(3)
char *$1;divert(0)')dnl
define(`VOIDSTAR',`divert(1)ifdef(`INIT',,`, ')$1`'undefine(`INIT')divert(3)
void *$1;divert(0)')dnl
define(`POINTER',`divert(1)ifdef(`INIT',,`, ')$2`'undefine(`INIT')divert(3)
$1 **$2;divert(0)')dnl
define(`VARARGS',`undefine(`NOT_VARIADIC')')dnl
changecom()dnl
define(`M4__PROTO',`dnl
define(`INIT',1)dnl
define(`NOT_VARIADIC',1)dnl
$2`'dnl
ifdef(`NOT_VARIADIC',`dnl
NAMEF($1)(undivert(1)undivert(2))undivert(3)dnl
divert(-1)undivert(5)undivert(6)divert(0)',`dnl
#ifdef UD_STDARG
NAMEF($1)(undivert(5)undivert(6),
...)
#else
NAMEF($1)(undivert(1)undivert(2), va_alist)undivert(3)
va_dcl
#endif
')')
changecom()
define(`M4__BODY',`
{undivert(4)')
divert(0)dnl
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