make: a2functional.h:173:38: error: expected type-specifier before string constant

[aprilsigda]

I am trying to build Aria2 on a Raspberry Pi 1 model B. I have installed all the necessary packages specified in README, autoconf -i ran with no errors, ./configure ran with no errors. But when I ran make, it gave me an error. Here is the full output:

make  all-recursive                                                                                                                                  
make[1]: Entering directory '/opt/aria2'                                                                                                             
Making all in po                                                                                                                                     
make[2]: Entering directory '/opt/aria2/po'                                                                                                          
make aria2.pot-update                                                                                                                                
make[3]: Entering directory '/opt/aria2/po'                                                                                                          
sed -e '/^#/d' remove-potcdate.sin > t-remove-potcdate.sed                                                                                           
mv t-remove-potcdate.sed remove-potcdate.sed                                                                                                         
if LC_ALL=C grep 'GNU aria2' ../* 2>/dev/null | grep -v 'libtool:' >/dev/null; then \                                                                
  package_gnu='GNU '; \                                                                                                                              
else \                                                                                                                                               
  package_gnu=''; \                                                                                                                                  
fi; \                                                                                                                                                
if test -n 'https://aria2.github.io/' || test 'https://github.com/aria2/aria2/issues' = '@'PACKAGE_BUGREPORT'@'; then \                              
  msgid_bugs_address='https://aria2.github.io/'; \                                                                                                   
else \                                                                                                                                               
  msgid_bugs_address='https://github.com/aria2/aria2/issues'; \                                                                                      
fi; \                                                                                                                                                
case `: --version | sed 1q | sed -e 's,^[^0-9]*,,'` in \                                                                                             
  '' | 0.[0-9] | 0.[0-9].* | 0.1[0-5] | 0.1[0-5].* | 0.16 | 0.16.[0-1]*) \                                                                           
    : --default-domain=aria2 --directory=.. \                                                                                                        
      --add-comments=TRANSLATORS: --keyword=_ --keyword=N_  \                                                                                        
      --files-from=./POTFILES.in \                                                                                                                   
      --copyright-holder='Tatsuhiro Tsujikawa' \                                                                                                     
      --msgid-bugs-address="$msgid_bugs_address" \                                                                                                   
    ;; \                                                                                                                                             
  *) \                                                                                                                                               
    : --default-domain=aria2 --directory=.. \                                                                                                        
      --add-comments=TRANSLATORS: --keyword=_ --keyword=N_  \                                                                                        
      --files-from=./POTFILES.in \                                                                                                                   
      --copyright-holder='Tatsuhiro Tsujikawa' \                                                                                                     
      --package-name="${package_gnu}aria2" \                                                                                                         
      --package-version='1.22.0' \                                                                                                                   
      --msgid-bugs-address="$msgid_bugs_address" \                                                                                                   
    ;; \                                                                                                                                             
esac                                                                                                                                                 
test ! -f aria2.po || { \                                                                                                                            
  if test -f ./aria2.pot; then \                                                                                                                     
    sed -f remove-potcdate.sed < ./aria2.pot > aria2.1po && \                                                                                        
    sed -f remove-potcdate.sed < aria2.po > aria2.2po && \                                                                                           
    if cmp aria2.1po aria2.2po >/dev/null 2>&1; then \                                                                                               
      rm -f aria2.1po aria2.2po aria2.po; \                                                                                                          
    else \                                                                                                                                           
      rm -f aria2.1po aria2.2po ./aria2.pot && \                                                                                                     
      mv aria2.po ./aria2.pot; \                                                                                                                     
    fi; \                                                                                                                                            
  else \                                                                                                                                             
    mv aria2.po ./aria2.pot; \                                                                                                                       
  fi; \                                                                                                                                              
}                                                                                                                                                    
make[3]: Leaving directory '/opt/aria2/po'                                                                                                           
test ! -f ./aria2.pot || \                                                                                                                           
  test -z "" || make                                                                                                                                 
make[2]: Leaving directory '/opt/aria2/po'                                                                                                           
Making all in lib                                                                                                                                    
make[2]: Entering directory '/opt/aria2/lib'                                                                                                         
make[2]: Nothing to be done for 'all'.                                                                                                               
make[2]: Leaving directory '/opt/aria2/lib'                                                                                                          
Making all in deps                                                                                                                                   
make[2]: Entering directory '/opt/aria2/deps'                                                                                                        
Making all in wslay                                                                                                                                  
make[3]: Entering directory '/opt/aria2/deps/wslay'                                                                                                  
make  all-recursive                                                                                                                                  
make[4]: Entering directory '/opt/aria2/deps/wslay'                                                                                                  
Making all in lib                                                                                                                                    
make[5]: Entering directory '/opt/aria2/deps/wslay/lib'                                                                                              
Making all in includes                                                                                                                               
make[6]: Entering directory '/opt/aria2/deps/wslay/lib/includes'                                                                                     
make[6]: Nothing to be done for 'all'.                                                                                                               
make[6]: Leaving directory '/opt/aria2/deps/wslay/lib/includes'                                                                                      
make[6]: Entering directory '/opt/aria2/deps/wslay/lib'                                                                                              
/bin/bash ../libtool --tag=CC   --mode=compile gcc -DHAVE_CONFIG_H -I. -I..  -DHAVE_CONFIG_H -I./includes -I./includes  -Wall -g -O2 -MT wslay_frame.
lo -MD -MP -MF .deps/wslay_frame.Tpo -c -o wslay_frame.lo wslay_frame.c                                                                              
libtool: compile:  gcc -DHAVE_CONFIG_H -I. -I.. -DHAVE_CONFIG_H -I./includes -I./includes -Wall -g -O2 -MT wslay_frame.lo -MD -MP -MF .deps/wslay_fra
me.Tpo -c wslay_frame.c  -fPIC -DPIC -o .libs/wslay_frame.o                                                                                          
libtool: compile:  gcc -DHAVE_CONFIG_H -I. -I.. -DHAVE_CONFIG_H -I./includes -I./includes -Wall -g -O2 -MT wslay_frame.lo -MD -MP -MF .deps/wslay_fra
me.Tpo -c wslay_frame.c -o wslay_frame.o >/dev/null 2>&1                                                                                             
mv -f .deps/wslay_frame.Tpo .deps/wslay_frame.Plo                                                                                                    
/bin/bash ../libtool --tag=CC   --mode=compile gcc -DHAVE_CONFIG_H -I. -I..  -DHAVE_CONFIG_H -I./includes -I./includes  -Wall -g -O2 -MT wslay_event.
lo -MD -MP -MF .deps/wslay_event.Tpo -c -o wslay_event.lo wslay_event.c                                                                              
libtool: compile:  gcc -DHAVE_CONFIG_H -I. -I.. -DHAVE_CONFIG_H -I./includes -I./includes -Wall -g -O2 -MT wslay_event.lo -MD -MP -MF .deps/wslay_eve
nt.Tpo -c wslay_event.c  -fPIC -DPIC -o .libs/wslay_event.o                                                                                          
libtool: compile:  gcc -DHAVE_CONFIG_H -I. -I.. -DHAVE_CONFIG_H -I./includes -I./includes -Wall -g -O2 -MT wslay_event.lo -MD -MP -MF .deps/wslay_eve
nt.Tpo -c wslay_event.c -o wslay_event.o >/dev/null 2>&1                                                                                             
mv -f .deps/wslay_event.Tpo .deps/wslay_event.Plo                                                                                                    
/bin/bash ../libtool --tag=CC   --mode=compile gcc -DHAVE_CONFIG_H -I. -I..  -DHAVE_CONFIG_H -I./includes -I./includes  -Wall -g -O2 -MT wslay_queue.
lo -MD -MP -MF .deps/wslay_queue.Tpo -c -o wslay_queue.lo wslay_queue.c                                                                              
libtool: compile:  gcc -DHAVE_CONFIG_H -I. -I.. -DHAVE_CONFIG_H -I./includes -I./includes -Wall -g -O2 -MT wslay_queue.lo -MD -MP -MF .deps/wslay_que
ue.Tpo -c wslay_queue.c  -fPIC -DPIC -o .libs/wslay_queue.o                                                                                          
libtool: compile:  gcc -DHAVE_CONFIG_H -I. -I.. -DHAVE_CONFIG_H -I./includes -I./includes -Wall -g -O2 -MT wslay_queue.lo -MD -MP -MF .deps/wslay_que
ue.Tpo -c wslay_queue.c -o wslay_queue.o >/dev/null 2>&1                                                                                             
mv -f .deps/wslay_queue.Tpo .deps/wslay_queue.Plo                                                                                                    
/bin/bash ../libtool --tag=CC   --mode=compile gcc -DHAVE_CONFIG_H -I. -I..  -DHAVE_CONFIG_H -I./includes -I./includes  -Wall -g -O2 -MT wslay_net.lo
 -MD -MP -MF .deps/wslay_net.Tpo -c -o wslay_net.lo wslay_net.c                                                                                      
libtool: compile:  gcc -DHAVE_CONFIG_H -I. -I.. -DHAVE_CONFIG_H -I./includes -I./includes -Wall -g -O2 -MT wslay_net.lo -MD -MP -MF .deps/wslay_net.T
po -c wslay_net.c  -fPIC -DPIC -o .libs/wslay_net.o                                                                                                  
libtool: compile:  gcc -DHAVE_CONFIG_H -I. -I.. -DHAVE_CONFIG_H -I./includes -I./includes -Wall -g -O2 -MT wslay_net.lo -MD -MP -MF .deps/wslay_net.T
po -c wslay_net.c -o wslay_net.o >/dev/null 2>&1                                                                                                     
mv -f .deps/wslay_net.Tpo .deps/wslay_net.Plo                                                                                                        
/bin/bash ../libtool --tag=CC   --mode=link gcc -Wall -g -O2 -no-undefined -version-info 0:1:0  -o libwslay.la   wslay_frame.lo wslay_event.lo wslay_
queue.lo wslay_net.lo                                                                                                                                
libtool: link: warning: `-version-info/-version-number' is ignored for convenience libraries                                                         
libtool: link: ar cru .libs/libwslay.a .libs/wslay_frame.o .libs/wslay_event.o .libs/wslay_queue.o .libs/wslay_net.o                                 
libtool: link: ranlib .libs/libwslay.a                                                                                                               
libtool: link: ( cd ".libs" && rm -f "libwslay.la" && ln -s "../libwslay.la" "libwslay.la" )                                                         
make[6]: Leaving directory '/opt/aria2/deps/wslay/lib'                                                                                               
make[5]: Leaving directory '/opt/aria2/deps/wslay/lib'                                                                                               
Making all in tests                                                                                                                                  
make[5]: Entering directory '/opt/aria2/deps/wslay/tests'                                                                                            
make[5]: Nothing to be done for 'all'.                                                                                                               
make[5]: Leaving directory '/opt/aria2/deps/wslay/tests'                                                                                             
make[5]: Entering directory '/opt/aria2/deps/wslay'                                                                                                  
make[5]: Leaving directory '/opt/aria2/deps/wslay'                                                                                                   
make[4]: Leaving directory '/opt/aria2/deps/wslay'                                                                                                   
make[3]: Leaving directory '/opt/aria2/deps/wslay'                                                                                                   
make[3]: Entering directory '/opt/aria2/deps'                                                                                                        
make[3]: Nothing to be done for 'all-am'.                                                                                                            
make[3]: Leaving directory '/opt/aria2/deps'                                                                                                         
make[2]: Leaving directory '/opt/aria2/deps'                                                                                                         
Making all in src                                                                                                                                    
make[2]: Entering directory '/opt/aria2/src'                                                                                                         
Making all in includes                                                                                                                               
make[3]: Entering directory '/opt/aria2/src/includes'                                                                                                
make[3]: Nothing to be done for 'all'.                                                                                                               
make[3]: Leaving directory '/opt/aria2/src/includes'                                                                                                 
make[3]: Entering directory '/opt/aria2/src'                                                                                                         
  CXX    A2STR.lo                                                                                                                                    
  CXX    AbstractAuthResolver.lo                                                                                                                     
In file included from AbstractAuthResolver.cc:37:0:                                                                                                  
a2functional.h:173:38: error: expected type-specifier before string constant                                                                         
a2functional.h:178:38: error: expected type-specifier before string constant                                                                         
a2functional.h:183:38: error: expected type-specifier before string constant                                                                         
a2functional.h:188:38: error: expected type-specifier before string constant                                                                         
a2functional.h:193:40: error: expected type-specifier before string constant                                                                         
a2functional.h:198:40: error: expected type-specifier before string constant                                                                         
a2functional.h:203:45: error: expected type-specifier before string constant                                                                         
Makefile:2292: recipe for target 'AbstractAuthResolver.lo' failed                                                                                    
make[3]: *** [AbstractAuthResolver.lo] Error 1                                                                                                       
make[3]: Leaving directory '/opt/aria2/src'                                                                                                          
Makefile:2334: recipe for target 'all-recursive' failed                                                                                              
make[2]: *** [all-recursive] Error 1                                                                                                                 
make[2]: Leaving directory '/opt/aria2/src'                                                                                                          
Makefile:490: recipe for target 'all-recursive' failed                                                                                               
make[1]: *** [all-recursive] Error 1                                                                                                                 
make[1]: Leaving directory '/opt/aria2'                                                                                                              
Makefile:400: recipe for target 'all' failed                                                                                                         
make: *** [all] Error 2`

[tatsuhiro-t]

This probably suggests that C++ compiler is a bit old. aria2 requires at least gcc >= 4.8.3 or clang >= 3.4.

[Artoria2e5]

Try -std=c++11 or -std=gnu++11. Custom literal is a C++11 thing, and older compilers may either don't support this feature or don't use this language standard by default (which is the case for g++ 4.7 where user-defined literals has already been implemented).

For building with confidence, my suggestion is to explicitly include language standard definitions (C & C++) in the project-default c{,xx}flags (AM_CFLAGS?).