stdbool.h gcc compiler query

[Patrick Welche <prlw1%cam.ac.uk@localhost>]

One of the hunks of XSA-55 which I am trying to apply to xenkernel42 is:

--- a/xen/include/xen/libelf.h
+++ b/xen/include/xen/libelf.h
@@ -29,6 +29,11 @@
 #error define architectural endianness
 #endif
 
+#include <stdbool.h>
+
+typedef int elf_errorstatus; /* 0: ok; -ve (normally -1): error */
+typedef int elf_negerrnoval; /* 0: ok; -EFOO: error */
+
 #undef ELFSIZE
 #include "elfstructs.h"
 #ifdef __XEN__

$ ls -l /usr/include/stdbool.h 
-r--r--r--  1 root  wheel  1784 Apr 29 17:46 /usr/include/stdbool.h

and the beginning of the long compiler line copied below contains
-I/usr/include (as well as -nostdinc), so why do I see

In file included from libelf-private.h:25:0,
                 from libelf-tools.c:19:
/tmp/pkgsrc/sysutils/xenkernel42/work.x86_64/xen-4.2.2/xen/include/xen/libelf.h:32:21:
 fatal error: stdbool.h: No such file or directory
compilation terminated.

? (This is on -current/amd64)

Cheers,

Patrick

gcc -O2 -I/usr/include -I/usr/pkg/include  -O2 -fomit-frame-pointer -m64 
-fno-strict-aliasing -std=gnu99 -Wall -Wstrict-prototypes 
-Wdeclaration-after-statement   -DNDEBUG -fno-builtin -fno-common 
-Wredundant-decls -iwithprefix include -Werror -Wno-pointer-arith -pipe 
-I/tmp/pkgsrc/sysutils/xenkernel42/work.x86_64/xen-4.2.2/xen/include  
-I/tmp/pkgsrc/sysutils/xenkernel42/work.x86_64/xen-4.2.2/xen/include/asm-x86/mach-generic
 
-I/tmp/pkgsrc/sysutils/xenkernel42/work.x86_64/xen-4.2.2/xen/include/asm-x86/mach-default
  -msoft-float -fno-stack-protector -fno-exceptions -Wnested-externs 
-mno-red-zone -mno-sse -fpic -fno-asynchronous-unwind-tables 
-DGCC_HAS_VISIBILITY_ATTRIBUTE -nostdinc -g -D__XEN__ -include 
/tmp/pkgsrc/sysutils/xenkernel42/work.x86_64/xen-4.2.2/xen/include/xen/config.h 
-DHAS_ACPI -DHAS_GDBSX -DHAS_PASSTHROUGH -MMD -MF .xen.d  -O2 
-fomit-frame-pointer -m64 -fno-strict-aliasing -std=gnu99 -Wall 
-Wstrict-prototypes -Wdeclaration-after-statement   -DNDEBUG -fno-builtin 
-fno-common -Wredundant-decls -iwithprefix include -Werror -Wno-pointer-arith 
-pipe -I/tmp/pkgsrc/sysutils/xenkernel42/work.x86_64/xen-4.2.2/xen/include  
-I/tmp/pkgsrc/sysutils/xenkernel42/work.x86_64/xen-4.2.2/xen/include/asm-x86/mach-generic
 
-I/tmp/pkgsrc/sysutils/xenkernel42/work.x86_64/xen-4.2.2/xen/include/asm-x86/mach-default
  -msoft-float -fno-stack-protector -fno-exceptions -Wnested-externs 
-mno-red-zone -mno-sse -fpic -fno-asynchronous-unwind-tables 
-DGCC_HAS_VISIBILITY_ATTRIBUTE -nostdinc -g -D__XEN__ -include 
/tmp/pkgsrc/sysutils/xenkernel42/work.x86_64/xen-4.2.2/xen/include/xen/config.h 
-DHAS_ACPI -DHAS_GDBSX -DHAS_PASSTHROUGH -MMD -MF .built_in.o.d  -O2 
-fomit-frame-pointer -m64 -fno-strict-aliasing -std=gnu99 -Wall 
-Wstrict-prototypes -Wdeclaration-after-statement   -DNDEBUG -fno-builtin 
-fno-common -Wredundant-decls -iwithprefix include -Werror -Wno-pointer-arith 
-pipe -I/tmp/pkgsrc/sysutils/xenkernel42/work.x86_64/xen-4.2.2/xen/include  
-I/tmp/pkgsrc/sysutils/xenkernel42/work.x86_64/xen-4.2.2/xen/include/asm-x86/mach-generic
 
-I/tmp/pkgsrc/sysutils/xenkernel42/work.x86_64/xen-4.2.2/xen/include/asm-x86/mach-default
  -msoft-float -fno-stack-protector -fno-exceptions -Wnested-externs 
-mno-red-zone -mno-sse -fpic -fno-asynchronous-unwind-tables 
-DGCC_HAS_VISIBILITY_ATTRIBUTE -nostdinc -g -D__XEN__ -include 
/tmp/pkgsrc/sysutils/xenkernel42/work.x86_64/xen-4.2.2/xen/include/xen/config.h 
-DHAS_ACPI -DHAS_GDBSX -DHAS_PASSTHROUGH -MMD -MF .x86_emulate.o.d -c 
x86_emulate.c -o x86_emulate.o