From c0daa902837561b1c114bdee9e8cee5f8797e610 Mon Sep 17 00:00:00 2001 From: Michael Koch Date: Sun, 2 Mar 2003 13:46:06 +0000 Subject: [PATCH] configure.in: Added check for memory mapping of files. 2003-03-02 Michael Koch * configure.in: Added check for memory mapping of files. * configure: Regenerated. * config.h.in: Regenerated. From-SVN: r63661 --- libjava/ChangeLog | 6 + libjava/configure | 266 ++++++++++++++++++++++++++++++++++++++++++++ libjava/configure.in | 1 + libjava/include/config.h.in | 6 + 4 files changed, 279 insertions(+) diff --git a/libjava/ChangeLog b/libjava/ChangeLog index 1cefce0..f4aca75 100644 --- a/libjava/ChangeLog +++ b/libjava/ChangeLog @@ -1,3 +1,9 @@ +2003-03-02 Michael Koch + + * configure.in: Added check for memory mapping of files. + * configure: Regenerated. + * config.h.in: Regenerated. + 2003-03-01 Jason Thorpe * posix-threads.cc: Include if HAVE_UNISTD_H is defined. diff --git a/libjava/configure b/libjava/configure index 567b70f..af3a1b3 100755 --- a/libjava/configure +++ b/libjava/configure @@ -8274,6 +8274,272 @@ EOF fi +for ac_hdr in unistd.h +do +ac_safe=`echo "$ac_hdr" | sed 'y%./+-%__p_%'` +echo $ac_n "checking for $ac_hdr""... $ac_c" 1>&6 +echo "configure:8268: checking for $ac_hdr" >&5 +if eval "test \"`echo '$''{'ac_cv_header_$ac_safe'+set}'`\" = set"; then + echo $ac_n "(cached) $ac_c" 1>&6 +else + cat > conftest.$ac_ext < +EOF +ac_try="$ac_cpp conftest.$ac_ext >/dev/null 2>conftest.out" +{ (eval echo configure:8278: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; } +ac_err=`grep -v '^ *+' conftest.out | grep -v "^conftest.${ac_ext}\$"` +if test -z "$ac_err"; then + rm -rf conftest* + eval "ac_cv_header_$ac_safe=yes" +else + echo "$ac_err" >&5 + echo "configure: failed program was:" >&5 + cat conftest.$ac_ext >&5 + rm -rf conftest* + eval "ac_cv_header_$ac_safe=no" +fi +rm -f conftest* +fi +if eval "test \"`echo '$ac_cv_header_'$ac_safe`\" = yes"; then + echo "$ac_t""yes" 1>&6 + ac_tr_hdr=HAVE_`echo $ac_hdr | sed 'y%abcdefghijklmnopqrstuvwxyz./-%ABCDEFGHIJKLMNOPQRSTUVWXYZ___%'` + cat >> confdefs.h <&6 +fi +done + +for ac_func in getpagesize +do +echo $ac_n "checking for $ac_func""... $ac_c" 1>&6 +echo "configure:8307: checking for $ac_func" >&5 +if eval "test \"`echo '$''{'ac_cv_func_$ac_func'+set}'`\" = set"; then + echo $ac_n "(cached) $ac_c" 1>&6 +else + cat > conftest.$ac_ext < +/* Override any gcc2 internal prototype to avoid an error. */ +/* We use char because int might match the return type of a gcc2 + builtin and then its argument prototype would still apply. */ +char $ac_func(); + +int main() { + +/* The GNU C library defines this for functions which it implements + to always fail with ENOSYS. Some functions are actually named + something starting with __ and the normal name is an alias. */ +#if defined (__stub_$ac_func) || defined (__stub___$ac_func) +choke me +#else +$ac_func(); +#endif + +; return 0; } +EOF +if { (eval echo configure:8335: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then + rm -rf conftest* + eval "ac_cv_func_$ac_func=yes" +else + echo "configure: failed program was:" >&5 + cat conftest.$ac_ext >&5 + rm -rf conftest* + eval "ac_cv_func_$ac_func=no" +fi +rm -f conftest* +fi + +if eval "test \"`echo '$ac_cv_func_'$ac_func`\" = yes"; then + echo "$ac_t""yes" 1>&6 + ac_tr_func=HAVE_`echo $ac_func | tr 'abcdefghijklmnopqrstuvwxyz' 'ABCDEFGHIJKLMNOPQRSTUVWXYZ'` + cat >> confdefs.h <&6 +fi +done + +echo $ac_n "checking for working mmap""... $ac_c" 1>&6 +echo "configure:8360: checking for working mmap" >&5 +if eval "test \"`echo '$''{'ac_cv_func_mmap_fixed_mapped'+set}'`\" = set"; then + echo $ac_n "(cached) $ac_c" 1>&6 +else + if test "$cross_compiling" = yes; then + ac_cv_func_mmap_fixed_mapped=no +else + cat > conftest.$ac_ext < +#include +#include + +/* This mess was copied from the GNU getpagesize.h. */ +#ifndef HAVE_GETPAGESIZE +# ifdef HAVE_UNISTD_H +# include +# endif + +/* Assume that all systems that can run configure have sys/param.h. */ +# ifndef HAVE_SYS_PARAM_H +# define HAVE_SYS_PARAM_H 1 +# endif + +# ifdef _SC_PAGESIZE +# define getpagesize() sysconf(_SC_PAGESIZE) +# else /* no _SC_PAGESIZE */ +# ifdef HAVE_SYS_PARAM_H +# include +# ifdef EXEC_PAGESIZE +# define getpagesize() EXEC_PAGESIZE +# else /* no EXEC_PAGESIZE */ +# ifdef NBPG +# define getpagesize() NBPG * CLSIZE +# ifndef CLSIZE +# define CLSIZE 1 +# endif /* no CLSIZE */ +# else /* no NBPG */ +# ifdef NBPC +# define getpagesize() NBPC +# else /* no NBPC */ +# ifdef PAGESIZE +# define getpagesize() PAGESIZE +# endif /* PAGESIZE */ +# endif /* no NBPC */ +# endif /* no NBPG */ +# endif /* no EXEC_PAGESIZE */ +# else /* no HAVE_SYS_PARAM_H */ +# define getpagesize() 8192 /* punt totally */ +# endif /* no HAVE_SYS_PARAM_H */ +# endif /* no _SC_PAGESIZE */ + +#endif /* no HAVE_GETPAGESIZE */ + +#ifdef __cplusplus +extern "C" { void *malloc(unsigned); } +#else +char *malloc(); +#endif + +int +main() +{ + char *data, *data2, *data3; + int i, pagesize; + int fd; + + pagesize = getpagesize(); + + /* + * First, make a file with some known garbage in it. + */ + data = malloc(pagesize); + if (!data) + exit(1); + for (i = 0; i < pagesize; ++i) + *(data + i) = rand(); + umask(0); + fd = creat("conftestmmap", 0600); + if (fd < 0) + exit(1); + if (write(fd, data, pagesize) != pagesize) + exit(1); + close(fd); + + /* + * Next, try to mmap the file at a fixed address which + * already has something else allocated at it. If we can, + * also make sure that we see the same garbage. + */ + fd = open("conftestmmap", O_RDWR); + if (fd < 0) + exit(1); + data2 = malloc(2 * pagesize); + if (!data2) + exit(1); + data2 += (pagesize - ((int) data2 & (pagesize - 1))) & (pagesize - 1); + if (data2 != mmap(data2, pagesize, PROT_READ | PROT_WRITE, + MAP_PRIVATE | MAP_FIXED, fd, 0L)) + exit(1); + for (i = 0; i < pagesize; ++i) + if (*(data + i) != *(data2 + i)) + exit(1); + + /* + * Finally, make sure that changes to the mapped area + * do not percolate back to the file as seen by read(). + * (This is a bug on some variants of i386 svr4.0.) + */ + for (i = 0; i < pagesize; ++i) + *(data2 + i) = *(data2 + i) + 1; + data3 = malloc(pagesize); + if (!data3) + exit(1); + if (read(fd, data3, pagesize) != pagesize) + exit(1); + for (i = 0; i < pagesize; ++i) + if (*(data + i) != *(data3 + i)) + exit(1); + close(fd); + unlink("conftestmmap"); + exit(0); +} + +EOF +if { (eval echo configure:8508: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext} && (./conftest; exit) 2>/dev/null +then + ac_cv_func_mmap_fixed_mapped=yes +else + echo "configure: failed program was:" >&5 + cat conftest.$ac_ext >&5 + rm -fr conftest* + ac_cv_func_mmap_fixed_mapped=no +fi +rm -fr conftest* +fi + +fi + +echo "$ac_t""$ac_cv_func_mmap_fixed_mapped" 1>&6 +if test $ac_cv_func_mmap_fixed_mapped = yes; then + cat >> confdefs.h <<\EOF +#define HAVE_MMAP 1 +EOF + +fi + for ac_prog in perl do diff --git a/libjava/configure.in b/libjava/configure.in index 037451d..5093966 100644 --- a/libjava/configure.in +++ b/libjava/configure.in @@ -970,6 +970,7 @@ AC_TRY_COMPILE([#include ], [struct tm tim; tim.tm_gmtoff = 0;], [AC_MSG_RESULT(no)])])]) AC_FUNC_ALLOCA +AC_FUNC_MMAP AC_CHECK_PROGS(PERL, perl, false) diff --git a/libjava/include/config.h.in b/libjava/include/config.h.in index 5fb6503..c6b3768 100644 --- a/libjava/include/config.h.in +++ b/libjava/include/config.h.in @@ -13,6 +13,9 @@ /* Define if you have and it should be used (not on Ultrix). */ #undef HAVE_ALLOCA_H +/* Define if you have a working `mmap' system call. */ +#undef HAVE_MMAP + /* Define if you have that is POSIX.1 compatible. */ #undef HAVE_SYS_WAIT_H @@ -217,6 +220,9 @@ /* Define if you have the gethostname function. */ #undef HAVE_GETHOSTNAME +/* Define if you have the getpagesize function. */ +#undef HAVE_GETPAGESIZE + /* Define if you have the getpwuid_r function. */ #undef HAVE_GETPWUID_R -- 2.7.4