Re: Problems with alloca on Alpha Linux with Compaq cc

Falk> Hi, Falk> with xemacs-21.2 CVS from October 12 and Compaq C V6.2-504 I get Falk> [...] Falk> checking for working alloca.h... no Falk> checking for alloca... no Falk> Defining C_ALLOCA Falk> checking whether alloca needs Cray hooks... no Falk> checking stack direction for C alloca... -1 Falk> Defining STACK_DIRECTION = -1 Falk> xemacs will be linked with "alloca.o" Falk> [...] Here's a patch that fixes it. After I commit this, I would like everyone (but especially Falk) who has an Alpha Linux system to test both gcc and ccc if possible. This is really a Compaq C bug workaround, since #include <alloca.h> should include a Compaq-specific header file (as gcc does), since alloca is a compiler-dependent function, not for library implementation. Index: ChangeLog =================================================================== RCS file: /usr/CVSroot/XEmacs/xemacs/ChangeLog,v retrieving revision 1.155.2.215 diff -u -w -U0 -r1.155.2.215 ChangeLog --- ChangeLog 2000/10/27 05:32:53 1.155.2.215 +++ ChangeLog 2000/11/01 05:40:19 ＠＠ -0,0 +1,4 ＠＠ +2000-11-01 Martin Buchholz <martin(a)xemacs.org&gt; + + * configure.in: Handle alloca with Compaq C on Alpha Linux. + Index: src/ChangeLog =================================================================== RCS file: /usr/CVSroot/XEmacs/xemacs/src/ChangeLog,v retrieving revision 1.154.2.732 diff -u -w -U0 -r1.154.2.732 ChangeLog --- src/ChangeLog 2000/11/01 02:56:16 1.154.2.732 +++ src/ChangeLog 2000/11/01 05:40:29 ＠＠ -2,0 +3,2 ＠＠ + * config.h.in: Handle alloca with Compaq C on Alpha Linux. + Index: src/config.h.in =================================================================== RCS file: /usr/CVSroot/XEmacs/xemacs/src/config.h.in,v retrieving revision 1.49.2.52 diff -u -w -r1.49.2.52 config.h.in --- src/config.h.in 2000/10/27 05:29:44 1.49.2.52 +++ src/config.h.in 2000/11/01 05:40:34 ＠＠ -34,7 +34,10 ＠＠ #ifndef NOT_C_CODE #ifdef __GNUC__ #define alloca __builtin_alloca -#elif HAVE_ALLOCA_H +#elif defined __DECC +#include <alloca.h> +#pragma intrinsic(alloca) +#elif defined HAVE_ALLOCA_H #include <alloca.h> #elif defined(_AIX) #pragma alloca Index: configure.in =================================================================== RCS file: /usr/CVSroot/XEmacs/xemacs/configure.in,v retrieving revision 1.111.2.130 diff -u -w -r1.111.2.130 configure.in --- configure.in 2000/10/27 05:32:52 1.111.2.130 +++ configure.in 2000/11/01 05:40:41 ＠＠ -3698,8 +3698,11 ＠＠ dnl AC_CHECK_FUNC(alloca, [:], [AC_CHECK_LIB(PW, alloca)]) dnl esac +dnl AC_FUNC_ALLOCA doesn't know about DEC C's #pragma intrinsic(alloca) +if test "$__DECC" != "yes"; then AC_FUNC_ALLOCA test -n "$ALLOCA" && XE_ADD_OBJS($ALLOCA) +fi dnl Check whether vfork exists and works correctly. (This does more dnl than just check for its existence.) If so, it defines HAVE_VFORK_H.