$NetBSD$

1. = preferred instead of == as the latter breaks compatibility on some
platforms and former is more portable.

2. As of NetBSD 9.2 pthread_*_setpshared aren't supported, hence the check is
skipped for NetBSD

--- configure.orig	2018-07-03 19:29:06.000000000 +0000
+++ configure
@@ -17303,7 +17303,7 @@ ac_try='"$LEX" --stdout conftest.lex >/d
 eval ac_try_echo="\":$LINENO: $ac_try\""
 echo "$ac_try_echo" >&5
 (eval "$ac_try") 2>&5
-if test $? == 0; then
+if test $? = 0; then
     ax_cv_check_flex_compat=yes
 else
     ax_cv_check_flex_compat=no
@@ -17358,7 +17358,8 @@ $as_echo "no" >&6; }
 fi
 
 
-
+if [ `uname` != NetBSD ]
+then
 
 ac_ext=c
 ac_cpp='$CPP $CPPFLAGS'
@@ -17410,6 +17411,8 @@ rm -f core *.core core.conftest.* gmon.o
   conftest.$ac_objext conftest.beam conftest.$ac_ext
 fi
 
+fi
+
 ac_ext=c
 ac_cpp='$CPP $CPPFLAGS'
 ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
@@ -28956,7 +28959,7 @@ as_fn_error $? "no acceptable atomic ope
 See \`config.log' for more details" "$LINENO" 5; }
 fi
 
-if test "x$have_libspg" == xyes; then
+if test "x$have_libspg" = xyes; then
 
 $as_echo "#define HAVE_LIBSPG /**/" >>confdefs.h
 
$NetBSD$

As of NetBSD 9.2 pthread_*_setpshared aren't supported. Default them to error
return value.

--- src/hre/hre_pthread.c.orig	2018-07-03 19:28:10.000000000 +0000
+++ src/hre/hre_pthread.c
@@ -17,6 +17,14 @@
 
 #include <hre/provider.h>
 
+#if defined(__NetBSD__)
+#  include <sys/param.h>
+#  if !__NetBSD_Prereq__(11, 0, 0)
+#    define pthread_mutexattr_setpshared(attr, flag) 1
+#    define pthread_condattr_setpshared(attr, flag) 1
+#  endif
+#endif
+
 /**
  * For pthreads we only use a small shared region for the queues.
  * For forks all shared objects are allocated on the region, so we try to claim
$NetBSD$

Some macros from sys/wait.h are used, #include is needed.

--- src/pins-lib/modules/dve-pins.c.orig	2018-07-03 19:28:10.000000000 +0000
+++ src/pins-lib/modules/dve-pins.c
@@ -6,6 +6,7 @@
 #include <stdlib.h>
 #include <sys/types.h>
 #include <sys/stat.h>
+#include <sys/wait.h>
 #include <unistd.h>
 
 #include <dm/dm.h>
$NetBSD$

Some macros from sys/wait.h are used, #include is needed.

--- src/pins-lib/modules/opaal-pins.c.orig	2018-07-03 19:28:10.000000000 +0000
+++ src/pins-lib/modules/opaal-pins.c
@@ -6,6 +6,7 @@
 #include <stdlib.h>
 #include <sys/types.h>
 #include <sys/stat.h>
+#include <sys/wait.h>
 #include <unistd.h>
 
 #include <dm/dm.h>
$NetBSD$

alloca.h inclusion is made conditional uniformly, such as in
vset-lib/vset_listdd.c

--- src/pins2lts-sym/pins2lts-sym.c.orig	2018-07-03 19:28:10.000000000 +0000
+++ src/pins2lts-sym/pins2lts-sym.c
@@ -1,7 +1,9 @@
 #include <hre/config.h>
 
 #include <float.h>
+#ifdef __APPLE__
 #include <alloca.h>
+#endif
 #include <assert.h>
 #include <dirent.h>
 #include <limits.h>
$NetBSD$

NetBSD does not support qsort_r

--- src/util-lib/sort_r.h.orig	2018-07-03 19:28:10.000000000 +0000
+++ src/util-lib/sort_r.h
@@ -182,7 +182,7 @@ static _SORT_R_INLINE void sort_r_simple
   {
     #if defined _SORT_R_LINUX
 
-      #if defined __GLIBC__ && ((__GLIBC__ < 2) || (__GLIBC__ == 2 && __GLIBC_MINOR__ < 8))
+      #if defined __GLIBC__ && ((__GLIBC__ < 2) || (__GLIBC__ == 2 && __GLIBC_MINOR__ < 8)) || defined __NetBSD__
 
         /* no qsort_r in glibc before 2.8, need to use nested qsort */
         sort_r_simple(base, nel, width, compar, arg);