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" >&6; } if ${am_cv_ar_interface+:} false; then : $as_echo_n "(cached) " >&6 else ac_ext=c ac_cpp='$CPP $CPPFLAGS' ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5' ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5' ac_compiler_gnu=$ac_cv_c_compiler_gnu am_cv_ar_interface=ar cat confdefs.h - <<_ACEOF >conftest.$ac_ext /* end confdefs.h. */ int some_variable = 0; _ACEOF if ac_fn_c_try_compile "$LINENO"; then : am_ar_try='$AR cru libconftest.a conftest.$ac_objext >&5' { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$am_ar_try\""; } >&5 (eval $am_ar_try) 2>&5 ac_status=$? $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5 test $ac_status = 0; } if test "$ac_status" -eq 0; then am_cv_ar_interface=ar else am_ar_try='$AR -NOLOGO -OUT:conftest.lib conftest.$ac_objext >&5' { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$am_ar_try\""; } >&5 (eval $am_ar_try) 2>&5 ac_status=$? $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5 test $ac_status = 0; } if test "$ac_status" -eq 0; then am_cv_ar_interface=lib else am_cv_ar_interface=unknown fi fi rm -f conftest.lib libconftest.a fi rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext ac_ext=c ac_cpp='$CPP $CPPFLAGS' ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5' ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5' ac_compiler_gnu=$ac_cv_c_compiler_gnu fi { $as_echo "$as_me:${as_lineno-$LINENO}: result: $am_cv_ar_interface" >&5 $as_echo "$am_cv_ar_interface" >&6; } case $am_cv_ar_interface in ar) ;; lib) # Microsoft lib, so override with the ar-lib wrapper script. # FIXME: It is wrong to rewrite AR. # But if we don't then we get into trouble of one sort or another. # A longer-term fix would be to have automake use am__AR in this case, # and then we could set am__AR="$am_aux_dir/ar-lib \$(AR)" or something # similar. AR="$am_aux_dir/ar-lib $AR" ;; unknown) as_fn_error $? "could not determine $AR interface" "$LINENO" 5 ;; esac if test -n "$ac_tool_prefix"; then # Extract the first word of "${ac_tool_prefix}readelf", so it can be a program name with args. set dummy ${ac_tool_prefix}readelf; ac_word=$2 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5 $as_echo_n "checking for $ac_word... " >&6; } if ${ac_cv_prog_READELF+:} false; then : $as_echo_n "(cached) " >&6 else if test -n "$READELF"; then ac_cv_prog_READELF="$READELF" # Let the user override the test. else as_save_IFS=$IFS; IFS=$PATH_SEPARATOR for as_dir in $PATH do IFS=$as_save_IFS test -z "$as_dir" && as_dir=. for ac_exec_ext in '' $ac_executable_extensions; do if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then ac_cv_prog_READELF="${ac_tool_prefix}readelf" $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5 break 2 fi done done IFS=$as_save_IFS fi fi READELF=$ac_cv_prog_READELF if test -n "$READELF"; then { $as_echo "$as_me:${as_lineno-$LINENO}: result: $READELF" >&5 $as_echo "$READELF" >&6; } else { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5 $as_echo "no" >&6; } fi fi if test -z "$ac_cv_prog_READELF"; then ac_ct_READELF=$READELF # Extract the first word of "readelf", so it can be a program name with args. set dummy readelf; ac_word=$2 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5 $as_echo_n "checking for $ac_word... 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" >&6; } if ${ac_cv_prog_NM+:} false; then : $as_echo_n "(cached) " >&6 else if test -n "$NM"; then ac_cv_prog_NM="$NM" # Let the user override the test. else as_save_IFS=$IFS; IFS=$PATH_SEPARATOR for as_dir in $PATH do IFS=$as_save_IFS test -z "$as_dir" && as_dir=. for ac_exec_ext in '' $ac_executable_extensions; do if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then ac_cv_prog_NM="${ac_tool_prefix}nm" $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5 break 2 fi done done IFS=$as_save_IFS fi fi NM=$ac_cv_prog_NM if test -n "$NM"; then { $as_echo "$as_me:${as_lineno-$LINENO}: result: $NM" >&5 $as_echo "$NM" >&6; } else { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5 $as_echo "no" >&6; } fi fi if test -z "$ac_cv_prog_NM"; then ac_ct_NM=$NM # Extract the first word of "nm", so it can be a program name with args. set dummy nm; ac_word=$2 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5 $as_echo_n "checking for $ac_word... " >&6; } if ${ac_cv_prog_ac_ct_NM+:} false; then : $as_echo_n "(cached) " >&6 else if test -n "$ac_ct_NM"; then ac_cv_prog_ac_ct_NM="$ac_ct_NM" # Let the user override the test. else as_save_IFS=$IFS; IFS=$PATH_SEPARATOR for as_dir in $PATH do IFS=$as_save_IFS test -z "$as_dir" && as_dir=. for ac_exec_ext in '' $ac_executable_extensions; do if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then ac_cv_prog_ac_ct_NM="nm" $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5 break 2 fi done done IFS=$as_save_IFS fi fi ac_ct_NM=$ac_cv_prog_ac_ct_NM if test -n "$ac_ct_NM"; then { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_ct_NM" >&5 $as_echo "$ac_ct_NM" >&6; } else { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5 $as_echo "no" >&6; } fi if test "x$ac_ct_NM" = x; then NM="" else case $cross_compiling:$ac_tool_warned in yes:) { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5 $as_echo "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;} ac_tool_warned=yes ;; esac NM=$ac_ct_NM fi else NM="$ac_cv_prog_NM" fi # We use -std=gnu99 but have explicit checks for some language constructs # and GNU extensions since some compilers claim GNU99 support, but don't # really support all language extensions. In particular we need # Mixed Declarations and Code # https://gcc.gnu.org/onlinedocs/gcc/Mixed-Declarations.html # Nested Functions # https://gcc.gnu.org/onlinedocs/gcc/Nested-Functions.html # Arrays of Variable Length # https://gcc.gnu.org/onlinedocs/gcc/Variable-Length.html { $as_echo "$as_me:${as_lineno-$LINENO}: checking for gcc with GNU99 support" >&5 $as_echo_n "checking for gcc with GNU99 support... " >&6; } if ${ac_cv_c99+:} false; then : $as_echo_n "(cached) " >&6 else old_CFLAGS="$CFLAGS" CFLAGS="$CFLAGS -std=gnu99" cat confdefs.h - <<_ACEOF >conftest.$ac_ext /* end confdefs.h. */ int foo (int a) { for (int i = 0; i < a; ++i) if (i % 4) break; int s = a; return s; } double bar (double a, double b) { double square (double z) { return z * z; } return square (a) + square (b); } void baz (int n) { struct S { int x[n]; }; } _ACEOF if ac_fn_c_try_compile "$LINENO"; then : ac_cv_c99=yes else ac_cv_c99=no fi rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext CFLAGS="$old_CFLAGS" fi { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_c99" >&5 $as_echo "$ac_cv_c99" >&6; } if test "x$ac_cv_c99" != xyes; then : as_fn_error $? "gcc with GNU99 support required" "$LINENO" 5 fi { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether gcc supports __attribute__((visibility()))" >&5 $as_echo_n "checking whether gcc supports __attribute__((visibility()))... " >&6; } if ${ac_cv_visibility+:} false; then : $as_echo_n "(cached) " >&6 else save_CFLAGS="$CFLAGS" CFLAGS="$save_CFLAGS -Werror" cat confdefs.h - <<_ACEOF >conftest.$ac_ext /* end confdefs.h. */ int __attribute__((visibility("hidden"))) foo (int a) { return a; } _ACEOF if ac_fn_c_try_compile "$LINENO"; then : ac_cv_visibility=yes else ac_cv_visibility=no fi rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext CFLAGS="$save_CFLAGS" fi { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_visibility" >&5 $as_echo "$ac_cv_visibility" >&6; } if test "$ac_cv_visibility" = "yes"; then $as_echo "@%:@define HAVE_VISIBILITY 1" >>confdefs.h fi { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether gcc supports __attribute__((gcc_struct))" >&5 $as_echo_n "checking whether gcc supports __attribute__((gcc_struct))... " >&6; } if ${ac_cv_gcc_struct+:} false; then : $as_echo_n "(cached) " >&6 else save_CFLAGS="$CFLAGS" CFLAGS="$save_CFLAGS -Werror" cat confdefs.h - <<_ACEOF >conftest.$ac_ext /* end confdefs.h. */ struct test { int x; } __attribute__((gcc_struct)); _ACEOF if ac_fn_c_try_compile "$LINENO"; then : ac_cv_gcc_struct=yes else ac_cv_gcc_struct=no fi rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext CFLAGS="$save_CFLAGS" fi { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_gcc_struct" >&5 $as_echo "$ac_cv_gcc_struct" >&6; } if test "$ac_cv_gcc_struct" = "yes"; then $as_echo "@%:@define HAVE_GCC_STRUCT 1" >>confdefs.h fi { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether gcc supports -fPIC" >&5 $as_echo_n "checking whether gcc supports -fPIC... " >&6; } if ${ac_cv_fpic+:} false; then : $as_echo_n "(cached) " >&6 else save_CFLAGS="$CFLAGS" CFLAGS="$save_CFLAGS -fPIC -Werror" cat confdefs.h - <<_ACEOF >conftest.$ac_ext /* end confdefs.h. */ _ACEOF if ac_fn_c_try_compile "$LINENO"; then : ac_cv_fpic=yes else ac_cv_fpic=no fi rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext CFLAGS="$save_CFLAGS" fi { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_fpic" >&5 $as_echo "$ac_cv_fpic" >&6; } if test "$ac_cv_fpic" = "yes"; then fpic_CFLAGS="-fPIC" else fpic_CFLAGS="" fi { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether gcc supports -fPIE" >&5 $as_echo_n "checking whether gcc supports -fPIE... " >&6; } if ${ac_cv_fpie+:} false; then : $as_echo_n "(cached) " >&6 else save_CFLAGS="$CFLAGS" CFLAGS="$save_CFLAGS -fPIE -Werror" cat confdefs.h - <<_ACEOF >conftest.$ac_ext /* end confdefs.h. */ _ACEOF if ac_fn_c_try_compile "$LINENO"; then : ac_cv_fpie=yes else ac_cv_fpie=no fi rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext CFLAGS="$save_CFLAGS" fi { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_fpie" >&5 $as_echo "$ac_cv_fpie" >&6; } if test "$ac_cv_fpie" = "yes"; then fpie_CFLAGS="-fPIE" else fpie_CFLAGS="" fi dso_LDFLAGS="-shared" ZDEFS_LDFLAGS="-Wl,-z,defs" { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether gcc supports $ZDEFS_LDFLAGS" >&5 $as_echo_n "checking whether gcc supports $ZDEFS_LDFLAGS... " >&6; } if ${ac_cv_zdefs+:} false; then : $as_echo_n "(cached) " >&6 else save_LDFLAGS="$LDFLAGS" LDFLAGS="$ZDEFS_LDFLAGS $save_LDFLAGS" cat confdefs.h - <<_ACEOF >conftest.$ac_ext /* end confdefs.h. */ int main () { ; return 0; } _ACEOF if ac_fn_c_try_link "$LINENO"; then : ac_cv_zdefs=yes else ac_cv_zdefs=no fi rm -f core conftest.err conftest.$ac_objext \ conftest$ac_exeext conftest.$ac_ext LDFLAGS="$save_LDFLAGS" fi { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_zdefs" >&5 $as_echo "$ac_cv_zdefs" >&6; } if test "$ac_cv_zdefs" = "yes"; then dso_LDFLAGS="$dso_LDFLAGS $ZDEFS_LDFLAGS" fi ZRELRO_LDFLAGS="-Wl,-z,relro" { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether gcc supports $ZRELRO_LDFLAGS" >&5 $as_echo_n "checking whether gcc supports $ZRELRO_LDFLAGS... " >&6; } if ${ac_cv_zrelro+:} false; then : $as_echo_n "(cached) " >&6 else save_LDFLAGS="$LDFLAGS" LDFLAGS="$ZRELRO_LDFLAGS $save_LDFLAGS" cat confdefs.h - <<_ACEOF >conftest.$ac_ext /* end confdefs.h. */ int main () { ; return 0; } _ACEOF if ac_fn_c_try_link "$LINENO"; then : ac_cv_zrelro=yes else ac_cv_zrelro=no fi rm -f core conftest.err conftest.$ac_objext \ conftest$ac_exeext conftest.$ac_ext LDFLAGS="$save_LDFLAGS" fi { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_zrelro" >&5 $as_echo "$ac_cv_zrelro" >&6; } if test "$ac_cv_zrelro" = "yes"; then dso_LDFLAGS="$dso_LDFLAGS $ZRELRO_LDFLAGS" fi { $as_echo "$as_me:${as_lineno-$LINENO}: checking for __thread support" >&5 $as_echo_n "checking for __thread support... " >&6; } if ${ac_cv_tls+:} false; then : $as_echo_n "(cached) " >&6 else # Use the same flags that we use for our DSOs, so the test is representative. # Some old compiler/linker/libc combinations fail some ways and not others. save_CFLAGS="$CFLAGS" save_LDFLAGS="$LDFLAGS" CFLAGS="$fpic_CFLAGS $CFLAGS" LDFLAGS="$dso_LDFLAGS $LDFLAGS" cat confdefs.h - <<_ACEOF >conftest.$ac_ext /* end confdefs.h. */ #include #undef __thread static __thread int a; int foo (int b) { return a + b; } int main () { exit (foo (0)); ; return 0; } _ACEOF if ac_fn_c_try_link "$LINENO"; then : ac_cv_tls=yes else ac_cv_tls=no fi rm -f core conftest.err conftest.$ac_objext \ conftest$ac_exeext conftest.$ac_ext CFLAGS="$save_CFLAGS" LDFLAGS="$save_LDFLAGS" fi { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_tls" >&5 $as_echo "$ac_cv_tls" >&6; } if test "x$ac_cv_tls" != xyes; then : as_fn_error $? "__thread support required" "$LINENO" 5 fi @%:@ Check whether --enable-largefile was given. if test "${enable_largefile+set}" = set; then : enableval=$enable_largefile; fi if test "$enable_largefile" != no; then { $as_echo "$as_me:${as_lineno-$LINENO}: checking for special C compiler options needed for large files" >&5 $as_echo_n "checking for special C compiler options needed for large files... " >&6; } if ${ac_cv_sys_largefile_CC+:} false; then : $as_echo_n "(cached) " >&6 else ac_cv_sys_largefile_CC=no if test "$GCC" != yes; then ac_save_CC=$CC while :; do # IRIX 6.2 and later do not support large files by default, # so use the C compiler's -n32 option if that helps. cat confdefs.h - <<_ACEOF >conftest.$ac_ext /* end confdefs.h. */ @%:@include /* Check that off_t can represent 2**63 - 1 correctly. We can't simply define LARGE_OFF_T to be 9223372036854775807, since some C++ compilers masquerading as C compilers incorrectly reject 9223372036854775807. */ @%:@define LARGE_OFF_T (((off_t) 1 << 62) - 1 + ((off_t) 1 << 62)) int off_t_is_large[(LARGE_OFF_T % 2147483629 == 721 && LARGE_OFF_T % 2147483647 == 1) ? 1 : -1]; int main () { ; return 0; } _ACEOF if ac_fn_c_try_compile "$LINENO"; then : break fi rm -f core conftest.err conftest.$ac_objext CC="$CC -n32" if ac_fn_c_try_compile "$LINENO"; then : ac_cv_sys_largefile_CC=' -n32'; break fi rm -f core conftest.err conftest.$ac_objext break done CC=$ac_save_CC rm -f conftest.$ac_ext fi fi { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_sys_largefile_CC" >&5 $as_echo "$ac_cv_sys_largefile_CC" >&6; } if test "$ac_cv_sys_largefile_CC" != no; then CC=$CC$ac_cv_sys_largefile_CC fi { $as_echo "$as_me:${as_lineno-$LINENO}: checking for _FILE_OFFSET_BITS value needed for large files" >&5 $as_echo_n "checking for _FILE_OFFSET_BITS value needed for large files... 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