Hi, While trying to compile fontconfig 2.5.92 on AIX 52 I am getting following errors after replacing FcChar16 with FcChar32 in the declaration of struct _FcCaseFold in src/fcint.h. sh ../src/makealias "../src" fcalias.h fcaliastail.h ../fontconfig/fontconfig.h ../src/fcdeprecate.h ../fontconfig/fcprivate.h gmake  all-am gmake[1]: Entering directory `/home/guest/fontconfig/fontconfig-2.5.92/src' source='fcatomic.c' object='fcatomic.lo' libtool=yes \ DEPDIR=.deps depmode=aix /opt/freeware/bin/bash ../depcomp \ /usr/vac/bin/xlc_r -DHAVE_INTTYPES_H -c -o fcatomic.lo fcatomic.c "fcdeprecate.h", line 30.1: 1506-485 (S) Parameter declaration list is incompatible with declarator for FcPublic. "fcdeprecate.h", line 33.1: 1506-276 (S) Syntax error: possible missing '{'? "fcint.h", line 126.5: 1506-045 (S) Undeclared identifier FcValueBindingWeak. "fcint.h", line 126.47: 1506-045 (S) Undeclared identifier FcValueBindingSame. "fcint.h", line 127.1: 1506-277 (S) Syntax error: possible missing ';' or ','? "fcint.h", line 127.3: 1506-273 (E) Missing type in declaration of FcValueBinding. "fcint.h", line 180.5: 1506-046 (S) Syntax error. "fcint.h", line 270.5: 1506-046 (S) Syntax error. "fcint.h", line 504.11: 1506-166 (S) Definition of function FcCache requires parentheses. "fcint.h", line 504.19: 1506-276 (S) Syntax error: possible missing '{'? "/usr/include/sys/flock.h", line 67.2: 1506-137 (E) Declaration must declare at least one declarator, tag, or the members of an enumeration. gmake[1]: *** [fcatomic.lo] Error 1 gmake[1]: Leaving directory `/home/guest/fontconfig/fontconfig-2.5.92/src' gmake: *** [all] Error 2 Can someone please help in identifying the root cause? -- Regards, Ashish