Compile error on centos 5

[samlabs821]

[email protected] postinstall /usr/local/lib/node_modules/grunt-contrib-imagemin/node_modules/imagemin/node_modules/imagemin-optipng/node_modules/optipng-bin
node lib/install.js

 warn : optipng pre-build test failed
 info : compiling from source
error : Error: Command failed: pngrtran.c:98: warning: ‘png_rtran_ok’ defined but not used

pngxmem.c: In function ‘pngx_malloc_rows_extended’:
pngxmem.c:37: warning: comparison is always false due to limited range of data type
ratio.c:25: error: conflicting types for ‘opng_longest_impl_t’
ratio.c:24: error: previous declaration of ‘opng_longest_impl_t’ was here
ratio.c:76: error: expected declaration specifiers or ‘...’ before ‘opng_ulongest_impl_t’
ratio.c:76: error: expected declaration specifiers or ‘...’ before ‘opng_ulongest_impl_t’
ratio.c: In function ‘opng_sprint_uratio_impl’:
ratio.c:90: error: ‘opng_ulongest_impl_t’ undeclared (first use in this function)
ratio.c:90: error: (Each undeclared identifier is reported only once
ratio.c:90: error: for each function it appears in.)
ratio.c:90: error: expected ‘;’ before ‘integer_part’
ratio.c:95: error: ‘denom’ undeclared (first use in this function)
ratio.c:97: error: ‘num’ undeclared (first use in this function)
ratio.c:117: error: ‘integer_part’ undeclared (first use in this function)
ratio.c:118: error: ‘remainder’ undeclared (first use in this function)
ratio.c: In function ‘opng_ulratio_to_factor_string’:
ratio.c:158: error: ‘opng_ulongest_impl_t’ undeclared (first use in this function)
ratio.c:158: error: expected ‘;’ before ‘num’
ratio.c:159: error: expected ‘;’ before ‘denom’
ratio.c:160: error: ‘num’ undeclared (first use in this function)
ratio.c:160: error: ‘denom’ undeclared (first use in this function)
ratio.c:160: error: too many arguments to function ‘opng_sprint_uratio_impl’
ratio.c:156: warning: unused parameter ‘ratio’
ratio.c: In function ‘opng_ulratio_to_percent_string’:
ratio.c:170: error: ‘opng_ulongest_impl_t’ undeclared (first use in this function)
ratio.c:170: error: expected ‘;’ before ‘num’
ratio.c:171: error: expected ‘;’ before ‘denom’
ratio.c:172: error: ‘num’ undeclared (first use in this function)
ratio.c:172: error: ‘denom’ undeclared (first use in this function)
ratio.c:172: error: too many arguments to function ‘opng_sprint_uratio_impl’
ratio.c:168: warning: unused parameter ‘ratio’
make[1]: *** [ratio.o] Error 1
make: *** [install] Error 2

at ChildProcess.exithandler (child_process.js:648:15)
at ChildProcess.emit (events.js:98:17)
at maybeClose (child_process.js:756:16)
at Socket.<anonymous> (child_process.js:969:11)
at Socket.emit (events.js:95:17)
at Pipe.close (net.js:465:12)

[kevva]

#40.