Hi Guys,

I'm undertaking a new project and changing it's coding from C to C++ and as normal gotten many errors doing so and was hoping some of you mates could lend a hand.

Making all in src
make[1]: Entering directory `/home/rds911/topm/topm/src'
make all-recursive
make[2]: Entering directory `/home/rds911/topm/topm/src'
Making all in libopm
make[3]: Entering directory `/home/rds911/topm/topm/src/libopm'
Making all in src
make[4]: Entering directory `/home/rds911/topm/topm/src/libopm/src'
make all-am
make[5]: Entering directory `/home/rds911/topm/topm/src/libopm/src'
if /bin/sh ../libtool --tag=CC --mode=compile g++ -DHAVE_CONFIG_H -I. -I. -I. -g -O2 -MT compat.lo -MD -MP -MF ".deps/compat.Tpo" -c -o compat.lo compat.c; \
then mv -f ".deps/compat.Tpo" ".deps/compat.Plo"; else rm -f ".deps/compat.Tpo"; exit 1; fi
mkdir .libs
g++ -DHAVE_CONFIG_H -I. -I. -I. -g -O2 -MT compat.lo -MD -MP -MF .deps/compat.Tpo -c compat.c -fPIC -DPIC -o .libs/compat.o
g++ -DHAVE_CONFIG_H -I. -I. -I. -g -O2 -MT compat.lo -MD -MP -MF .deps/compat.Tpo -c compat.c -o compat.o >/dev/null 2>&1
if /bin/sh ../libtool --tag=CC --mode=compile g++ -DHAVE_CONFIG_H -I. -I. -I. -g -O2 -MT config.lo -MD -MP -MF ".deps/config.Tpo" -c -o config.lo config.c; \
then mv -f ".deps/config.Tpo" ".deps/config.Plo"; else rm -f ".deps/config.Tpo"; exit 1; fi
g++ -DHAVE_CONFIG_H -I. -I. -I. -g -O2 -MT config.lo -MD -MP -MF .deps/config.Tpo -c config.c -fPIC -DPIC -o .libs/config.o
config.c: In function 'OPM_CONFIG_T* libopm_config_create()':
config.c:68: error: invalid conversion from 'void*' to 'OPM_CONFIG_T*'
config.c:69: error: invalid conversion from 'void*' to 'void**'
make[5]: *** [config.lo] Error 1
if /bin/sh ../libtool --tag=CC --mode=compile g++ -DHAVE_CONFIG_H -I. -I. -I. -g -O2 -MT inet.lo -MD -MP -MF ".deps/inet.Tpo" -c -o inet.lo inet.c; \
then mv -f ".deps/inet.Tpo" ".deps/inet.Plo"; else rm -f ".deps/inet.Tpo"; exit 1; fi
g++ -DHAVE_CONFIG_H -I. -I. -I. -g -O2 -MT inet.lo -MD -MP -MF .deps/inet.Tpo -c inet.c -fPIC -DPIC -o .libs/inet.o
g++ -DHAVE_CONFIG_H -I. -I. -I. -g -O2 -MT inet.lo -MD -MP -MF .deps/inet.Tpo -c inet.c -o inet.o >/dev/null 2>&1
if /bin/sh ../libtool --tag=CC --mode=compile g++ -DHAVE_CONFIG_H -I. -I. -I. -g -O2 -MT libopm.lo -MD -MP -MF ".deps/libopm.Tpo" -c -o libopm.lo libopm.c; \
then mv -f ".deps/libopm.Tpo" ".deps/libopm.Plo"; else rm -f ".deps/libopm.Tpo"; exit 1; fi
g++ -DHAVE_CONFIG_H -I. -I. -I. -g -O2 -MT libopm.lo -MD -MP -MF .deps/libopm.Tpo -c libopm.c -fPIC -DPIC -o .libs/libopm.o
libopm.c: In function 'OPM_T* opm_create()':
libopm.c:125: error: invalid conversion from 'void*' to 'OPM_T*'
libopm.c:134: error: invalid conversion from 'void*' to 'OPM_CALLBACK_T*'
libopm.c: In function 'OPM_REMOTE_T* opm_remote_create(const char*)':
libopm.c:165: error: invalid conversion from 'void*' to 'OPM_REMOTE_T*'
libopm.c: In function 'OPM_PROTOCOL_CONFIG_T* libopm_protocol_config_create()':
libopm.c:474: error: invalid conversion from 'void*' to 'OPM_PROTOCOL_CONFIG_T*'
libopm.c: In function 'OPM_SCAN_T* libopm_scan_create(OPM_T*, OPM_REMOTE_T*)':
libopm.c:685: error: invalid conversion from 'void*' to 'OPM_SCAN_T*'
libopm.c: In function 'OPM_CONNECTION_T* libopm_connection_create()':
libopm.c:772: error: invalid conversion from 'void*' to 'OPM_CONNECTION_T*'
libopm.c: In function 'void libopm_check_poll(OPM_T*)':
libopm.c:1098: error: invalid conversion from 'void*' to 'pollfd*'
make[5]: *** [libopm.lo] Error 1
if /bin/sh ../libtool --tag=CC --mode=compile g++ -DHAVE_CONFIG_H -I. -I. -I. -g -O2 -MT list.lo -MD -MP -MF ".deps/list.Tpo" -c -o list.lo list.c; \
then mv -f ".deps/list.Tpo" ".deps/list.Plo"; else rm -f ".deps/list.Tpo"; exit 1; fi
g++ -DHAVE_CONFIG_H -I. -I. -I. -g -O2 -MT list.lo -MD -MP -MF .deps/list.Tpo -c list.c -fPIC -DPIC -o .libs/list.o
list.c: In function 'OPM_NODE_T* libopm_node_create(void*)':
list.c:32: error: invalid conversion from 'void*' to 'OPM_NODE_T*'
list.c: In function 'OPM_LIST_T* libopm_list_create()':
list.c:42: error: invalid conversion from 'void*' to 'OPM_LIST_T*'
make[5]: ***[list.lo] Error 1
if /bin/sh ../libtool --tag=CC --mode=compile g++ -DHAVE_CONFIG_H -I. -I. -I. -g -O2 -MT malloc.lo -MD -MP -MF ".deps/malloc.Tpo" -c -o malloc.lo malloc.c; \
then mv -f ".deps/malloc.Tpo" ".deps/malloc.Plo"; else rm -f ".deps/malloc.Tpo"; exit 1; fi
g++ -DHAVE_CONFIG_H -I. -I. -I. -g -O2 -MT malloc.lo -MD -MP -MF .deps/malloc.Tpo -c malloc.c -fPIC -DPIC -o .libs/malloc.o
g++ -DHAVE_CONFIG_H -I. -I. -I. -g -O2 -MT malloc.lo -MD -MP -MF .deps/malloc.Tpo -c malloc.c -o malloc.o >/dev/null 2>&1
if /bin/sh ../libtool --tag=CC --mode=compile g++ -DHAVE_CONFIG_H -I. -I. -I. -g -O2 -MT proxy.lo -MD -MP -MF ".deps/proxy.Tpo" -c -o proxy.lo proxy.c; \
then mv -f ".deps/proxy.Tpo" ".deps/proxy.Plo"; else rm -f ".deps/proxy.Tpo"; exit 1; fi
g++ -DHAVE_CONFIG_H -I. -I. -I. -g -O2 -MT proxy.lo -MD -MP -MF .deps/proxy.Tpo -c proxy.c -fPIC -DPIC -o .libs/proxy.o
proxy.c: In function 'int libopm_proxy_http_write(OPM_T*, OPM_SCAN_T*, OPM_CONNECTION_T*)':
proxy.c:49: error: 'libopm_snprintf' was not declared in this scope
proxy.c: In function 'int libopm_proxy_socks4_write(OPM_T*, OPM_SCAN_T*, OPM_CONNECTION_T*)':
proxy.c:89: error: 'libopm_snprintf' was not declared in this scope
proxy.c: In function 'int libopm_proxy_socks5_write(OPM_T*, OPM_SCAN_T*, OPM_CONNECTION_T*)':
proxy.c:155: error: 'libopm_snprintf' was not declared in this scope
proxy.c: In function 'int libopm_proxy_wingate_write(OPM_T*, OPM_SCAN_T*, OPM_CONNECTION_T*)':
proxy.c:188: error: 'libopm_snprintf' was not declared in this scope
proxy.c: In function 'int libopm_proxy_router_write(OPM_T*, OPM_SCAN_T*, OPM_CONNECTION_T*)':
proxy.c:212: error: 'libopm_snprintf' was not declared in this scope
proxy.c: In function 'int libopm_proxy_httppost_write(OPM_T*, OPM_SCAN_T*, OPM_CONNECTION_T*)':
proxy.c:240: error: 'libopm_snprintf' was not declared in this scope
proxy.c: In function 'int libopm_proxy_httpget_write(OPM_T*, OPM_SCAN_T*, OPM_CONNECTION_T*)':
proxy.c:260: error: 'libopm_snprintf' was not declared in this scope
make[5]: *** [proxy.lo] Error 1
if g++ -DHAVE_CONFIG_H -I. -I. -I. -g -O2 -MT test.o -MD -MP -MF ".deps/test.Tpo" -c -o test.o test.c; \
then mv -f ".deps/test.Tpo" ".deps/test.Po"; else rm -f ".deps/test.Tpo"; exit 1; fi
test.c: In function 'int main(int, char**)':
test.c:97: error: invalid conversion from 'const void*' to 'void*'
test.c:97: error: initializing argument 3 of 'OPM_ERR_T opm_config(OPM_T*, int, void*)'
test.c:99: error: invalid conversion from 'const void*' to 'void*'
test.c:99: error: initializing argument 3 of 'OPM_ERR_T opm_config(OPM_T*, int, void*)'
test.c:100: error: invalid conversion from 'const void*' to 'void*'
test.c:100: error: initializing argument 3 of 'OPM_ERR_T opm_config(OPM_T*, int, void*)'
make[5]: *** [test.o] Error 1
make[5]: Target `all-am' not remade because of errors.
make[5]: Leaving directory `/home/rds911/topm/topm/src/libopm/src'
make[4]: *** [all] Error 2
make[4]: Leaving directory `/home/rds911/topm/topm/src/libopm/src'
Making all in doc
make[4]: Entering directory `/home/rds911/topm/topm/src/libopm/doc'
make[4]: Nothing to be done for `all'.
make[4]: Leaving directory `/home/rds911/topm/topm/src/libopm/doc'
make[4]: Entering directory `/home/rds911/topm/topm/src/libopm'
make[4]: Nothing to be done for `all-am'.
make[4]: Leaving directory `/home/rds911/topm/topm/src/libopm'
make[3]: *** [all-recursive] Error 1
make[3]: Target `all' not remade because of errors.
make[3]: Leaving directory `/home/rds911/topm/topm/src/libopm'
Making all in .
make[3]: Entering directory `/home/rds911/topm/topm/src'
if g++ -DHAVE_CONFIG_H -I. -I. -I. -DTOPM_ETCDIR="\"/root/topm/etc\"" -DTOPM_LOGDIR="\"/root/topm/var\"" -g -O2 -MT compat.o -MD -MP -MF ".deps/compat.Tpo" -c -o compat.o compat.c; \
then mv -f ".deps/compat.Tpo" ".deps/compat.Po"; else rm -f ".deps/compat.Tpo"; exit 1; fi
if g++ -DHAVE_CONFIG_H -I. -I. -I. -DTOPM_ETCDIR="\"/root/topm/etc\"" -DTOPM_LOGDIR="\"/root/topm/var\"" -g -O2 -MT config-parser.o -MD -MP -MF ".deps/config-parser.Tpo" -c -o config-parser.o config-parser.c; \
then mv -f ".deps/config-parser.Tpo" ".deps/config-parser.Po"; else rm -f ".deps/config-parser.Tpo"; exit 1; fi
config-parser.y: In function 'int yyparse()':
config-parser.y:235: error: invalid conversion from 'void*' to 'ChannelConf*'
config-parser.y:257: error: invalid conversion from 'void*' to 'ChannelConf*'
config-parser.y:265: error: invalid conversion from 'void*' to 'ChannelConf*'
config-parser.y:273: error: invalid conversion from 'void*' to 'ChannelConf*'
config-parser.y:286: error: invalid conversion from 'void*' to 'UserConf*'
config-parser.y:332: error: invalid conversion from 'void*' to 'ScannerConf*'
config-parser.y:339: error: invalid conversion from 'void*' to 'ScannerConf*'
config-parser.y:465: error: invalid conversion from 'void*' to 'ProtocolConf*'
config-parser.y:514: error: invalid conversion from 'void*' to 'BlacklistConf*'
config-parser.y:541: error: invalid conversion from 'void*' to 'BlacklistConf*'
config-parser.y:548: error: invalid conversion from 'void*' to 'BlacklistConf*'
config-parser.y:555: error: invalid conversion from 'void*' to 'BlacklistConf*'
config-parser.y:566: error: invalid conversion from 'void*' to 'BlacklistConf*'
config-parser.y:580: error: invalid conversion from 'void*' to 'BlacklistConf*'
config-parser.y:583: error: invalid conversion from 'void*' to 'BlacklistReplyConf*'
make[3]: *** [config-parser.o] Error 1
if g++ -DHAVE_CONFIG_H -I. -I. -I. -DTOPM_ETCDIR="\"/root/topm/etc\"" -DTOPM_LOGDIR="\"/root/topm/var\"" -g -O2 -MT config-lexer.o -MD -MP -MF ".deps/config-lexer.Tpo" -c -o config-lexer.o config-lexer.c; \
then mv -f ".deps/config-lexer.Tpo" ".deps/config-lexer.Po"; else rm -f ".deps/config-lexer.Tpo"; exit 1; fi
config-lexer.l: In function 'void ccomment()':
config-lexer.l:219: error: 'input' was not declared in this scope
config-lexer.l:223: error: 'input' was not declared in this scope
make[3]: *** [config-lexer.o] Error 1
if g++ -DHAVE_CONFIG_H -I. -I. -I. -DTOPM_ETCDIR="\"/root/topm/etc\"" -DTOPM_LOGDIR="\"/root/topm/var\"" -g -O2 -MT config.o -MD -MP -MF ".deps/config.Tpo" -c -o config.o config.c; \
then mv -f ".deps/config.Tpo" ".deps/config.Po"; else rm -f ".deps/config.Tpo"; exit 1; fi
config.c: In function 'void config_init()':
config.c:89: error: invalid conversion from 'void*' to 'IRCConf*'
config.c:95: error: invalid conversion from 'void*' to 'OptionsConf*'
config.c:99: error: invalid conversion from 'void*' to 'OpmConf*'
config.c:110: error: invalid conversion from 'void*' to 'ExemptConf*'
make[3]: *** [config.o] Error 1
if g++ -DHAVE_CONFIG_H -I. -I. -I. -DTOPM_ETCDIR="\"/root/topm/etc\"" -DTOPM_LOGDIR="\"/root/topm/var\"" -g -O2 -MT dnsbl.o -MD -MP -MF ".deps/dnsbl.Tpo" -c -o dnsbl.o dnsbl.c; \
then mv -f ".deps/dnsbl.Tpo" ".deps/dnsbl.Po"; else rm -f ".deps/dnsbl.Tpo"; exit 1; fi
dnsbl.c: In function 'void dnsbl_add(scan_struct*)':
dnsbl.c:76: error: invalid conversion from 'void*' to 'BlacklistConf*'
dnsbl.c:84: error: invalid conversion from 'void*' to 'dnsbl_scan*'
dnsbl.c: In function 'void dnsbl_positive(scan_struct*, BlacklistConf*, unsigned char)':
dnsbl.c:116: error: invalid conversion from 'void*' to 'BlacklistReplyConf*'
dnsbl.c:132: error: invalid conversion from 'void*' to 'BlacklistReplyConf*'
dnsbl.c: In function 'void dnsbl_result(firedns_result*)':
dnsbl.c:173: error: invalid conversion from 'void*' to 'dnsbl_scan*'
make[3]: *** [dnsbl.o] Error 1
if g++ -DHAVE_CONFIG_H -I. -I. -I. -DTOPM_ETCDIR="\"/root/topm/etc\"" -DTOPM_LOGDIR="\"/root/topm/var\"" -g -O2 -MT inet.o -MD -MP -MF ".deps/inet.Tpo" -c -o inet.o inet.c; \
then mv -f ".deps/inet.Tpo" ".deps/inet.Po"; else rm -f ".deps/inet.Tpo"; exit 1; fi
if g++ -DHAVE_CONFIG_H -I. -I. -I. -DTOPM_ETCDIR="\"/root/topm/etc\"" -DTOPM_LOGDIR="\"/root/topm/var\"" -g -O2 -MT irc.o -MD -MP -MF ".deps/irc.Tpo" -c -o irc.o irc.c; \
then mv -f ".deps/irc.Tpo" ".deps/irc.Po"; else rm -f ".deps/irc.Tpo"; exit 1; fi
irc.c: In function 'ChannelConf* get_channel(const char*)':
irc.c:682: error: invalid conversion from 'void*' to 'ChannelConf*'
irc.c: In function 'UserInfo* userinfo_create(char*)':
irc.c:742: error: invalid conversion from 'void*' to 'UserInfo*'
irc.c: In function 'void m_notice(char**, unsigned int, char*, UserInfo*)':
irc.c:1009: error: invalid conversion from 'void*' to 'regex_t*'
make[3]: *** [irc.o] Error 1
if g++ -DHAVE_CONFIG_H -I. -I. -I. -DTOPM_ETCDIR="\"/root/topm/etc\"" -DTOPM_LOGDIR="\"/root/topm/var\"" -g -O2 -MT log.o -MD -MP -MF ".deps/log.Tpo" -c -o log.o log.c; \
then mv -f ".deps/log.Tpo" ".deps/log.Po"; else rm -f ".deps/log.Tpo"; exit 1; fi
if g++ -DHAVE_CONFIG_H -I. -I. -I. -DTOPM_ETCDIR="\"/root/topm/etc\"" -DTOPM_LOGDIR="\"/root/topm/var\"" -g -O2 -MT main.o -MD -MP -MF ".deps/main.Tpo" -c -o main.o main.c; \
then mv -f ".deps/main.Tpo" ".deps/main.Po"; else rm -f ".deps/main.Tpo"; exit 1; fi
main.c: In function 'int main(int, char**)':
main.c:110: error: invalid conversion from 'void*' to 'char*'
main.c:111: error: invalid conversion from 'void*' to 'char*'
make[3]: *** [main.o] Error 1
if g++ -DHAVE_CONFIG_H -I. -I. -I. -DTOPM_ETCDIR="\"/root/topm/etc\"" -DTOPM_LOGDIR="\"/root/topm/var\"" -g -O2 -MT match.o -MD -MP -MF ".deps/match.Tpo" -c -o match.o match.c; \
then mv -f ".deps/match.Tpo" ".deps/match.Po"; else rm -f ".deps/match.Tpo"; exit 1; fi
if g++ -DHAVE_CONFIG_H -I. -I. -I. -DTOPM_ETCDIR="\"/root/topm/etc\"" -DTOPM_LOGDIR="\"/root/topm/var\"" -g -O2 -MT misc.o -MD -MP -MF ".deps/misc.Tpo" -c -o misc.o misc.c; \
then mv -f ".deps/misc.Tpo" ".deps/misc.Po"; else rm -f ".deps/misc.Tpo"; exit 1; fi
if g++ -DHAVE_CONFIG_H -I. -I. -I. -DTOPM_ETCDIR="\"/root/topm/etc\"" -DTOPM_LOGDIR="\"/root/topm/var\"" -g -O2 -MT malloc.o -MD -MP -MF ".deps/malloc.Tpo" -c -o malloc.o malloc.c; \
then mv -f ".deps/malloc.Tpo" ".deps/malloc.Po"; else rm -f ".deps/malloc.Tpo"; exit 1; fi
malloc.c: In function 'char* DupString(const char*)':
malloc.c:74: error: invalid conversion from 'void*' to 'char*'
make[3]: *** [malloc.o] Error 1
if g++ -DHAVE_CONFIG_H -I. -I. -I. -DTOPM_ETCDIR="\"/root/topm/etc\"" -DTOPM_LOGDIR="\"/root/topm/var\"" -g -O2 -MT list.o -MD -MP -MF ".deps/list.Tpo" -c -o list.o list.c; \
then mv -f ".deps/list.Tpo" ".deps/list.Po"; else rm -f ".deps/list.Tpo"; exit 1; fi
list.c: In function 'node_t* node_create(void*)':
list.c:29: error: invalid conversion from 'void*' to 'node_t*'
list.c: In function 'list_t* list_create()':
list.c:39: error: invalid conversion from 'void*' to 'list_t*'
make[3]: ***[list.o] Error 1
if g++ -DHAVE_CONFIG_H -I. -I. -I. -DTOPM_ETCDIR="\"/root/topm/etc\"" -DTOPM_LOGDIR="\"/root/topm/var\"" -g -O2 -MT negcache.o -MD -MP -MF ".deps/negcache.Tpo" -c -o negcache.o negcache.c; \
then mv -f ".deps/negcache.Tpo" ".deps/negcache.Po"; else rm -f ".deps/negcache.Tpo"; exit 1; fi
negcache.c: In function 'void nc_init(cnode**)':
negcache.c:78: error: invalid conversion from 'void*' to 'cnode*'
negcache.c: In function 'cnode* nc_insert(cnode*, long unsigned int)':
negcache.c:147: error: invalid conversion from 'void*' to 'cnode*'
negcache.c: In function 'void nc_rebuild(cnode*, cnode*, cnode*, time_t)':
negcache.c:215: error: expected unqualified-id before 'new'
negcache.c:215: error: expected initializer before 'new'
negcache.c:253: error: expected type-specifier before '=' token
negcache.c:253: error: invalid lvalue in assignment
negcache.c:254: error: expected type-specifier before '->' token
negcache.c:254: error: expected `;' before '->' token
make[3]: *** [negcache.o] Error 1
if g++ -DHAVE_CONFIG_H -I. -I. -I. -DTOPM_ETCDIR="\"/root/topm/etc\"" -DTOPM_LOGDIR="\"/root/topm/var\"" -g -O2 -MT opercmd.o -MD -MP -MF ".deps/opercmd.Tpo" -c -o opercmd.o opercmd.c; \
then mv -f ".deps/opercmd.Tpo" ".deps/opercmd.Po"; else rm -f ".deps/opercmd.Tpo"; exit 1; fi
opercmd.c: In function 'Command* command_create(short unsigned int, char*, char*, ChannelConf*)':
opercmd.c:234: error: invalid conversion from 'void*' to 'Command*'
opercmd.c: In function 'void cmd_restart(char*, char*, ChannelConf*)':
opercmd.c:403: error: 'main_restart' was not declared in this scope
make[3]: *** [opercmd.o] Error 1
if g++ -DHAVE_CONFIG_H -I. -I. -I. -DTOPM_ETCDIR="\"/root/topm/etc\"" -DTOPM_LOGDIR="\"/root/topm/var\"" -g -O2 -MT scan.o -MD -MP -MF ".deps/scan.Tpo" -c -o scan.o scan.c; \
then mv -f ".deps/scan.Tpo" ".deps/scan.Po"; else rm -f ".deps/scan.Tpo"; exit 1; fi
scan.c: In function 'void scan_init()':
scan.c:222: error: invalid conversion from 'void*' to 'ScannerConf*'
scan.c:223: error: invalid conversion from 'void*' to 'scanner_struct*'
scan.c: In function 'scan_struct* scan_create(char**, char*)':
scan.c:471: error: invalid conversion from 'void*' to 'scan_struct*'
scan.c: In function 'void scan_manual(char*, ChannelConf*)':
scan.c:1022: error: invalid conversion from 'void*' to 'scan_struct*'
make[3]: *** [scan.o] Error 1
if g++ -DHAVE_CONFIG_H -I. -I. -I. -DTOPM_ETCDIR="\"/root/topm/etc\"" -DTOPM_LOGDIR="\"/root/topm/var\"" -g -O2 -MT stats.o -MD -MP -MF ".deps/stats.Tpo" -c -o stats.o stats.c; \
then mv -f ".deps/stats.Tpo" ".deps/stats.Po"; else rm -f ".deps/stats.Tpo"; exit 1; fi
stats.c: In function 'void stats_output(char*)':
stats.c:199: error: invalid conversion from 'void*' to 'BlacklistConf*'
make[3]: *** [stats.o] Error 1
if g++ -DHAVE_CONFIG_H -I. -I. -I. -DTOPM_ETCDIR="\"/root/topm/etc\"" -DTOPM_LOGDIR="\"/root/topm/var\"" -g -O2 -MT firedns.o -MD -MP -MF ".deps/firedns.Tpo" -c -o firedns.o firedns.c; \
then mv -f ".deps/firedns.Tpo" ".deps/firedns.Po"; else rm -f ".deps/firedns.Tpo"; exit 1; fi
firedns.c:100: error: expected identifier before ';' token
firedns.c:115: error: expected identifier before ';' token
firedns.c:151: error: expected identifier before ',' token
firedns.c: In function 'int firedns_getip(int, const char*, void*)':
firedns.c:320: error: expected unqualified-id before 'class'
firedns.c:320: error: expected `;' before 'class'
firedns.c: In function 's_connection* firedns_add_query()':
firedns.c:357: error: invalid conversion from 'void*' to 's_connection*'
firedns.c: At global scope:
firedns.c:389: error: expected identifier before ',' token
firedns.c: In function 'int firedns_build_query_payload(const char*, short unsigned int, short unsigned int, unsigned char*)':
firedns.c:423: error: expected primary-expression before 'class'
firedns.c:423: error: expected `)' before 'class'
firedns.c: In function 'firedns_result* firedns_getresult(int)':
firedns.c:691: error: expected unqualified-id before 'class'
firedns.c:691: error: expected `)' before 'class'
firedns.c:691: error: expected unqualified-id before 'class'
firedns.c:691: error: expected `)' before 'class'
firedns.c: In function 'void firedns_cycle()':
firedns.c:736: error: invalid conversion from 'void*' to 'pollfd*'
make[3]: *** [firedns.o] Error 1
make[3]: *** No rule to make target `libopm/src/.libs/libopm.a', needed by `topm'.
if g++ -DHAVE_CONFIG_H -I. -I. -I. -DTOPM_ETCDIR="\"/root/topm/etc\"" -DTOPM_LOGDIR="\"/root/topm/var\"" -g -O2 -MT snprintf.o -MD -MP -MF ".deps/snprintf.Tpo" -c -o snprintf.o snprintf.c; \
then mv -f ".deps/snprintf.Tpo" ".deps/snprintf.Po"; else rm -f ".deps/snprintf.Tpo"; exit 1; fi
snprintf.c: In function 'int portable_vsnprintf(char*, size_t, const char*, char*)':
snprintf.c:544: error: invalid conversion from 'void*' to 'const char*'
make[3]: *** [snprintf.o] Error 1
make[3]: Target `all-am' not remade because of errors.
make[3]: Leaving directory `/home/rds911/topm/topm/src'
make[2]: *** [all-recursive] Error 1
make[2]: Leaving directory `/home/rds911/topm/topm/src'
make[1]: *** [all] Error 2
make[1]: Leaving directory `/home/rds911/topm/topm/src'
make[1]: Entering directory `/home/rds911/topm/topm'
make[1]: Nothing to be done for `all-am'.
make[1]: Leaving directory `/home/rds911/topm/topm'
make: *** [all-recursive] Error 1
make: Target `all' not remade because of errors.

Here's one of your common errors:

In C, you can implicitly convert a void* to any other data pointer. In C++, you can't, so you need to cast each one to the appropriate type. Or, use new/delete instead of malloc/free.

Also, C++ has more reserved words than C. For example, you can't use "new" or "class" as identifiers.