--- a/auto/unix
+++ b/auto/unix
@@ -68,6 +68,7 @@ ngx_feature="setproctitle()"
 ngx_feature_name="NGX_HAVE_SETPROCTITLE"
 ngx_feature_run=no
 ngx_feature_incs=
+ngx_feature_path=
 ngx_feature_libs=$NGX_SETPROCTITLE_LIB
 ngx_feature_test="setproctitle(\"test\");"
 . auto/feature
@@ -77,6 +78,7 @@ ngx_feature="pread()"
 ngx_feature_name="NGX_HAVE_PREAD"
 ngx_feature_run=no
 ngx_feature_incs=
+ngx_feature_path=
 ngx_feature_libs=
 ngx_feature_test="char buf[1]; ssize_t n; n = pread(0, buf, 1, 0)"
 . auto/feature
@@ -86,6 +88,7 @@ ngx_feature="pwrite()"
 ngx_feature_name="NGX_HAVE_PWRITE"
 ngx_feature_run=no
 ngx_feature_incs=
+ngx_feature_path=
 ngx_feature_libs=
 ngx_feature_test="char buf[1]; ssize_t n; n = pwrite(1, buf, 1, 0)"
 . auto/feature
@@ -95,6 +98,7 @@ ngx_feature="strerror_r()"
 ngx_feature_name="NGX_HAVE_STRERROR_R"
 ngx_feature_run=yes
 ngx_feature_incs="#include <string.h>"
+ngx_feature_path=
 ngx_feature_libs=
 ngx_feature_test="char buf[1024]; long n; n = strerror_r(1, buf, 1024);
                   if (n < 0 || n > 1024) return 1;"
@@ -107,6 +111,7 @@ ngx_feature="gnu style strerror_r()"
 ngx_feature_name="NGX_HAVE_GNU_STRERROR_R"
 ngx_feature_run=yes
 ngx_feature_incs="#include <string.h>"
+ngx_feature_path=
 ngx_feature_libs=
 ngx_feature_test="char buf[1024]; long n; n = strerror_r(1, buf, 1024);
                   if (n >= 0 && n < 1024) return 1;"
@@ -117,6 +122,7 @@ ngx_feature="localtime_r()"
 ngx_feature_name="NGX_HAVE_LOCALTIME_R"
 ngx_feature_run=no
 ngx_feature_incs="#include <time.h>"
+ngx_feature_path=
 ngx_feature_libs=
 ngx_feature_test="struct tm t; time_t c=0; localtime_r(&c, &t)"
 . auto/feature
@@ -126,6 +132,7 @@ ngx_feature="posix_memalign()"
 ngx_feature_name="NGX_HAVE_POSIX_MEMALIGN"
 ngx_feature_run=no
 ngx_feature_incs="#include <stdlib.h>"
+ngx_feature_path=
 ngx_feature_libs=
 ngx_feature_test="void *p; int n; n = posix_memalign(&p, 4096, 4096)"
 . auto/feature
@@ -135,6 +142,7 @@ ngx_feature="memalign()"
 ngx_feature_name="NGX_HAVE_MEMALIGN"
 ngx_feature_run=no
 ngx_feature_incs="#include <stdlib.h>"
+ngx_feature_path=
 ngx_feature_libs=
 ngx_feature_test="void *p; p = memalign(4096, 4096)"
 . auto/feature
@@ -144,6 +152,7 @@ ngx_feature="sched_yield()"
 ngx_feature_name="NGX_HAVE_SCHED_YIELD"
 ngx_feature_run=no
 ngx_feature_incs="#include <sched.h>"
+ngx_feature_path=
 ngx_feature_libs=
 ngx_feature_test="sched_yield()"
 . auto/feature
@@ -153,6 +162,7 @@ ngx_feature="mmap(MAP_ANON|MAP_SHARED)"
 ngx_feature_name="NGX_HAVE_MAP_ANON"
 ngx_feature_run=yes
 ngx_feature_incs="#include <sys/mman.h>"
+ngx_feature_path=
 ngx_feature_libs=
 ngx_feature_test="void *p;
                   p = mmap(NULL, 4096, PROT_READ|PROT_WRITE,
@@ -167,6 +177,7 @@ ngx_feature_run=yes
 ngx_feature_incs="#include <sys/mman.h>
 #include <sys/stat.h>
 #include <fcntl.h>"
+ngx_feature_path=
 ngx_feature_libs=
 ngx_feature_test='void *p; int  fd;
                   fd = open("/dev/zero", O_RDWR);
@@ -180,6 +191,7 @@ ngx_feature_name="NGX_HAVE_SYSVSHM"
 ngx_feature_run=yes
 ngx_feature_incs="#include <sys/ipc.h>
 #include <sys/shm.h>"
+ngx_feature_path=
 ngx_feature_libs=
 ngx_feature_test="int  id;
                   id = shmget(IPC_PRIVATE, 4096, (SHM_R|SHM_W|IPC_CREAT));
@@ -192,6 +204,7 @@ ngx_feature="struct msghdr.msg_control"
 ngx_feature_name="NGX_HAVE_MSGHDR_MSG_CONTROL"
 ngx_feature_run=no
 ngx_feature_incs="#include <sys/socket.h>"
+ngx_feature_path=
 ngx_feature_libs=
 ngx_feature_test="struct msghdr  msg; msg.msg_control = NULL"
 . auto/feature
@@ -202,6 +215,7 @@ ngx_feature_name="NGX_HAVE_FIONBIO"
 ngx_feature_run=no
 ngx_feature_incs="#include <sys/ioctl.h>
 $NGX_INCLUDE_SYS_FILIO_H"
+ngx_feature_path=
 ngx_feature_libs=
 ngx_feature_test="int i; i = FIONBIO"
 . auto/feature
@@ -211,6 +225,7 @@ ngx_feature="struct tm.tm_gmtoff"
 ngx_feature_name="NGX_HAVE_GMTOFF"
 ngx_feature_run=no
 ngx_feature_incs="#include <time.h>"
+ngx_feature_path=
 ngx_feature_libs=
 ngx_feature_test="struct tm  tm; tm.tm_gmtoff = 0"
 . auto/feature