[Bug 226198] devel/libpci: fails to build on -CURRENT in poudriere

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=226198

            Bug ID: 226198
           Summary: devel/libpci: fails to build on -CURRENT in poudriere
           Product: Ports & Packages
           Version: Latest
          Hardware: amd64
                OS: Any
            Status: New
          Severity: Affects Only Me
          Priority: ---
         Component: Individual Port(s)
          Assignee: sunpoet at FreeBSD.org
          Reporter: novel at FreeBSD.org
             Flags: maintainer-feedback?(sunpoet at FreeBSD.org)
          Assignee: sunpoet at FreeBSD.org

I have a strange build failure in devel/libpci:

===>  Building for libpci-3.5.6                                                 
gmake[1]: Entering directory
'/wrkdirs/usr/ports/devel/libpci/work/pciutils-3.5.6'                           
gmake -C lib all                                                                
gmake[2]: Entering directory
'/wrkdirs/usr/ports/devel/libpci/work/pciutils-3.5.6/lib'                       
cc -O2 -pipe  -fPIC -fstack-protector -fno-strict-aliasing  -Wall -W
-Wno-parentheses -Wstrict-prototypes -Wmissing-prototypes -I/usr/src/sys   -c
-o init.o init.c                                                
In file included from init.c:9:                                                 
/usr/include/stdio.h:72:9: error: unknown type name '__va_list'                 
typedef __va_list       va_list;                                                
        ^                                                                       
In file included from init.c:10:                                                
/usr/include/stdlib.h:95:7: error: expected function body after function
declarator                                                                      
             __alloc_size2(1, 2);                                               
             ^                                                                  
/usr/include/stdlib.h:306:6: error: expected function body after function
declarator                                                                      
            __alloc_size2(2, 3);                                                
            ^                                                                   
init.c:98:3: warning: incompatible integer to pointer conversion passing
'va_list' (aka 'int') to parameter of type 'struct __va_list_tag *'
[-Wint-conversion]                                                    
  va_start(args, msg);                                                          
  ^~~~~~~~~~~~~~~~~~~                                                           
/usr/include/sys/_stdarg.h:46:49: note: expanded from macro 'va_start'          
  #define       va_start(ap, last)      __builtin_va_start((ap), (last))        
                                                           ^~~~                 
init.c:110:3: warning: incompatible integer to pointer conversion passing
'va_list' (aka 'int') to parameter of type 'struct __va_list_tag *'
[-Wint-conversion]                                                   
  va_start(args, msg);                                                          
  ^~~~~~~~~~~~~~~~~~~                                                           
/usr/include/sys/_stdarg.h:46:49: note: expanded from macro 'va_start'          
  #define       va_start(ap, last)      __builtin_va_start((ap), (last))        
                                                           ^~~~                 
init.c:121:3: warning: incompatible integer to pointer conversion passing
'va_list' (aka 'int') to parameter of type 'struct __va_list_tag *'
[-Wint-conversion]                                                   
  va_start(args, msg);                                                          
  ^~~~~~~~~~~~~~~~~~~                                                           
/usr/include/sys/_stdarg.h:46:49: note: expanded from macro 'va_start'          
  #define       va_start(ap, last)      __builtin_va_start((ap), (last))        
                                                           ^~~~                 
init.c:123:10: warning: incompatible integer to pointer conversion passing
'va_list' (aka 'int') to parameter of type 'struct __va_list_tag *'
[-Wint-conversion]                                                  
  va_end(args);                                                                 
         ^~~~                                                                   
/usr/include/sys/_stdarg.h:52:40: note: expanded from macro 'va_end'            
  #define       va_end(ap)              __builtin_va_end(ap)                    
                                                         ^~                     
4 warnings and 3 errors generated.                                              
gmake[2]: *** [<builtin>: init.o] Error 1                                       
gmake[2]: Leaving directory
'/wrkdirs/usr/ports/devel/libpci/work/pciutils-3.5.6/lib'                       
gmake[1]: *** [Makefile:62: lib/libpci.a] Error 2                               
gmake[1]: Leaving directory
'/wrkdirs/usr/ports/devel/libpci/work/pciutils-3.5.6'                           
*** Error code 1                                                                

Stop.                                                                           
make: stopped in /usr/ports/devel/libpci  


Ports tree and jail were updated yesterday.

Ports tree:

local     portsnap 2018-02-24 19:27:45 /usr/local/poudriere/ports/local 

current         12.0-CURRENT 1200058 amd64   src=/home/novel/freebsd 2018-02-24
19:26:24 /usr/local/poudriere/jails/current   

I get get it to build if I comment out "CFLAGS += -I/usr/src/sys" in
lib/Makefile (in $WRKSRC):

ifdef PCI_HAVE_PM_FBSD_DEVICE
OBJS += fbsd-device
#CFLAGS += -I/usr/src/sys
ifdef FREEBSD_SYS
CFLAGS += -I${FREEBSD_SYS}
endif
endif

Now the interesting part.

1. I cannot reproduce that on a host box which uses the same /usr/src and
/usr/ports as this poudriere jail that builds fails in.
2. I cannot reproduce that on a different host that has the same /usr/src (and
/usr/obj) and the same /usr/ports all mounted via NFS.
3. I cannot reproduce that on the second host with poudriere that uses its own
copy of the source and the ports tree (updated yesterday as well).

So could that actually be a bug in poudriere?

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