Fridrich Strba from SUSE discovered that after JDK-8204572, building OpenJDK fails when configuring to use system headers for libraries like jpeg and lcms with:

=== Output from failing command(s) repeated here ===
/usr/bin/printf "* For target support_native_java.desktop_libjavajpeg_imageioJPEG.o:\n"
* For target support_native_java.desktop_libjavajpeg_imageioJPEG.o:
(/usr/bin/grep -v -e "^Note: including file:" < /srv/glaubitz/openjdk/jdk/build/linux-x86_64-normal-server-release/make-support/failure-logs/support_native_java.desktop_libjavajpeg_imageioJPEG.o.log || true) | /usr/bin/head -n 12
/srv/glaubitz/openjdk/jdk/src/java.desktop/share/native/libjavajpeg/imageioJPEG.c:49:10: fatal error: com_sun_imageio_plugins_jpeg_JPEGImageReader.h: No such file or directory
 #include "com_sun_imageio_plugins_jpeg_JPEGImageReader.h"
          ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
compilation terminated.
if test `/usr/bin/wc -l < /srv/glaubitz/openjdk/jdk/build/linux-x86_64-normal-server-release/make-support/failure-logs/support_native_java.desktop_libjavajpeg_imageioJPEG.o.log` -gt 12; then /usr/bin/echo " ... (rest of output omitted)" ; fi
/usr/bin/printf "* For target support_native_java.desktop_liblcms_LCMS.o:\n"
* For target support_native_java.desktop_liblcms_LCMS.o:
(/usr/bin/grep -v -e "^Note: including file:" < /srv/glaubitz/openjdk/jdk/build/linux-x86_64-normal-server-release/make-support/failure-logs/support_native_java.desktop_liblcms_LCMS.o.log || true) | /usr/bin/head -n 12
/srv/glaubitz/openjdk/jdk/src/java.desktop/share/native/liblcms/LCMS.c:29:10: fatal error: sun_java2d_cmm_lcms_LCMS.h: No such file or directory
 #include "sun_java2d_cmm_lcms_LCMS.h"
          ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
compilation terminated.
if test `/usr/bin/wc -l < /srv/glaubitz/openjdk/jdk/build/linux-x86_64-normal-server-release/make-support/failure-logs/support_native_java.desktop_liblcms_LCMS.o.log` -gt 12; then /usr/bin/echo " ... (rest of output omitted)" ; fi
/usr/bin/printf "\n* All command lines available in /srv/glaubitz/openjdk/jdk/build/linux-x86_64-normal-server-release/make-support/failure-logs.\n"

* All command lines available in /srv/glaubitz/openjdk/jdk/build/linux-x86_64-normal-server-release/make-support/failure-logs.
/usr/bin/printf "=== End of repeated output ===\n"
=== End of repeated output ===

This can be fixed with:

--- jdk11/make/common/JdkNativeCompilation.gmk Wed Jun 20 19:46:44 2018 -0700
+++ jdk11/make/common/JdkNativeCompilation.gmk Thu Jun 21 10:10:16 2018 +0200
@@ -119,9 +119,11 @@
   endif
 
   ifneq ($$($1_HEADERS_FROM_SRC), false)
- $1_SRC_HEADER_FLAGS := $$(foreach dir, $$(wildcard $$($1_SRC) \
- $$(call GetJavaHeaderDir, $$(MODULE))), -I$$(dir))
+ $1_SRC_HEADER_FLAGS := $$(addprefix -I, $$(wildcard $$($1_SRC)))
   endif
+ # Always add the java header dir
+ $1_SRC_HEADER_FLAGS += $$(addprefix -I, $$(call GetJavaHeaderDir, $$(MODULE)))
+
   ifneq ($$($1_EXTRA_HEADER_DIRS), )
     $1_PROCESSED_EXTRA_HEADER_DIRS := $$(foreach dir, $$($1_EXTRA_HEADER_DIRS), \
         $$(call ProcessDir, $$(dir)))