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Revision 2187, 2.3 kB
(checked in by ensc, 3 years ago)
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- do not use the local kernelheaders anymore; this causes problems on
cross-compiling
- use a fallback headerfile to determine syscall #
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- Property svn:eol-style set to
native
- Property svn:keywords set to
Author Date Id Revision
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AC_DEFUN([ENSC_SYSCALLNR], |
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[ |
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AC_REQUIRE([AC_PROG_CPP]) |
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AC_REQUIRE([AC_PROG_EGREP]) |
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AC_CACHE_CHECK([for number of syscall '$1'], [ensc_cv_value_syscall_$1], |
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[ |
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AC_LANG_PUSH(C) |
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AC_LANG_CONFTEST([ |
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ensc_syscall_tmp_nr=__NR_$1; |
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ensc_syscall_tmp_src=ENSC_MARK |
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]) |
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ensc_syscall_tmp_nr= |
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ensc_syscall_tmp_src= |
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test x"$ensc_syscall_tmp_nr" != x || \ |
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eval $($CPP $CPPFLAGS -D ENSC_MARK='glibc' conftest.c | $EGREP '^ensc_syscall_tmp_(nr=[[1-9]][[0-9]]*;|src=.*)$') |
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test x"$ensc_syscall_tmp_nr" != x -o x'$3' = x || \ |
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eval $($CPP $CPPFLAGS -D ENSC_MARK='fallback' -D ENSC_SYSCALL_FALLBACK='"$3"' conftest.c | $EGREP '^ensc_syscall_tmp_(nr=[[1-9]][[0-9]]*;|src=.*)$') |
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test "$ensc_syscall_tmp_nr" || { |
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ensc_syscall_tmp_nr=$2 |
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ensc_syscall_tmp_src=default |
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} |
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if test x"$ensc_syscall_tmp_nr" = x; then |
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AC_MSG_ERROR( |
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[Can not determine value of __NR_$1; please verify your glibc/kernelheaders, and/or set CPPFLAGS='-D__NR_$1=<value>' environment when calling configure.]) |
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fi |
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AC_LANG_POP |
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ensc_cv_value_syscall_$1="$ensc_syscall_tmp_nr/$ensc_syscall_tmp_src" |
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]) |
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ensc_syscall_tmp_nr=${ensc_cv_value_syscall_$1%/*} |
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ensc_syscall_tmp_src=${ensc_cv_value_syscall_$1 |
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if test x"$ensc_syscall_tmp_src" != x'glibc'; then |
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AC_DEFINE_UNQUOTED(ENSC_SYSCALL__NR_$1, $ensc_syscall_tmp_nr, [The number of the $1 syscall]) |
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fi |
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]) |
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