49 lines
1.3 KiB
Plaintext
49 lines
1.3 KiB
Plaintext
$OpenBSD: patch-configure_in,v 1.3 2004/05/27 16:38:30 brad Exp $
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--- configure.in.orig 2004-05-26 11:15:53.000000000 -0400
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+++ configure.in 2004-05-27 01:24:16.000000000 -0400
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@@ -665,6 +665,44 @@ AC_TRY_COMPILE([
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AC_MSG_RESULT(no)
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])
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+dnl * If mmap() plays nicely with write()
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+AC_MSG_CHECKING([whether we need to use MS_INVALIDATE with mmaps])
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+AC_TRY_RUN([
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+ #include <stdio.h>
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+ #include <sys/types.h>
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+ #include <sys/stat.h>
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+ #include <unistd.h>
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+ #include <fcntl.h>
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+ #include <sys/mman.h>
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+ int main() {
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+ /* return 0 if we're signed */
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+ int f = open("conftest.mmap", O_RDWR|O_CREAT|O_TRUNC);
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+ void *mem;
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+ if (f == -1) {
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+ perror("open()");
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+ return 1;
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+ }
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+ write(f, "1", 2);
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+ mem = mmap(NULL, 2, PROT_READ|PROT_WRITE, MAP_SHARED, f, 0);
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+ if (mem == MAP_FAILED) {
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+ perror("mmap()");
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+ return 1;
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+ }
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+ strcpy(mem, "2");
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+ msync(mem, 2, MS_SYNC);
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+ lseek(f, 0, SEEK_SET);
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+ write(f, "3", 2);
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+
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+ return strcmp(mem, "3") == 0 ? 0 : 1;
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+ }
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+], [
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+ AC_MSG_RESULT(no)
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+], [
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+ AC_MSG_RESULT(yes)
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+ AC_DEFINE(NEED_MS_INVALIDATE,, Define if your mmap() implementation requires use of MS_INVALIDATE to work with write())
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+])
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+
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+
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dnl * Solaris compatible sendfilev()
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AC_CHECK_LIB(sendfile, sendfilev, [
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LIBS="$LIBS -lsendfile"
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