pmwebapi build failure

[Ken McDonell <kenj@xxxxxxxxxxxxxxxx>]

On

vm00        3.8.0    x86_64  Ubuntu 12.04 (precise)

with these libmicrohttpd* packages installed

ii  libmicrohttpd-dev                      0.4.6-1                              
      library embedding HTTP server functionality (development)
ii  libmicrohttpd5                         0.4.6-1                              
      library embedding HTTP server functionality

I am seeing this ....

=== pmwebapi ===
gcc  -fpic -fno-strict-aliasing -D_GNU_SOURCE -fstack-protector-all 
-D_FORTIFY_SOURCE=2 -Wextra -fPIE -Wall -O2 -g -DPCP_DEBUG 
-DPCP_VERSION=\"3.8.0\" -I../../src/include -I../../src/include/pcp   -c -o 
main.o main.c
main.c: In function ‘mhd_respond’:
main.c:89:5: warning: implicit declaration of function 
‘MHD_create_response_from_buffer’ [-Wimplicit-function-declaration]
main.c:91:45: error: ‘MHD_RESPMEM_PERSISTENT’ undeclared (first use in this 
function)
main.c:91:45: note: each undeclared identifier is reported only once for each 
function it appears in
main.c: In function ‘pmweb_notify’:
main.c:565:5: warning: implicit declaration of function ‘va_start’ 
[-Wimplicit-function-declaration]
main.c:567:5: warning: implicit declaration of function ‘va_end’ 
[-Wimplicit-function-declaration]