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Compile error with the current groff git head


From: T. Kurt Bond
Subject: Compile error with the current groff git head
Date: Fri, 4 Dec 2020 12:44:56 -0500

When I try to compile groff on macOS Catalina with the compiler tools
installed by Xcode 12.2 (12B4b) and commit
534680662889eb74dac3e100bcadf97e5962f027 I get the following error:

  CXX      src/libs/libgroff/libgroff_a-curtime.o
In file included from src/libs/libgroff/curtime.cpp:20:
In file included from
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/stdlib.h:100:
./lib/math.h:38:3: error: "Please include config.h first."
 #error "Please include config.h first."
  ^
./lib/math.h:40:1: error: unknown type name '_GL_INLINE_HEADER_BEGIN'
_GL_INLINE_HEADER_BEGIN
^
./lib/math.h:1625:1: error: expected unqualified-id
_GL_CXXALIAS_SYS (frexp, double, (double x, int *expptr));
^
./lib/math.h:256:5: note: expanded from macro '_GL_CXXALIAS_SYS'
    _GL_EXTERN_C int _gl_cxxalias_dummy
    ^
./lib/math.h:136:30: note: expanded from macro '_GL_EXTERN_C'
# define _GL_EXTERN_C extern "C"
                             ^
./lib/math.h:3100:1: error: unknown type name '_GL_INLINE_HEADER_END'
_GL_INLINE_HEADER_END
^
In file included from src/libs/libgroff/curtime.cpp:21:
In file included from ./lib/string.h:41:
In file included from
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/string.h:60:
/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/string.h:69:1:
error: expected unqualified-id
__BEGIN_DECLS
^
/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/sys/cdefs.h:71:32:
note: expanded from macro '__BEGIN_DECLS'
#define __BEGIN_DECLS   extern "C" {
                               ^
In file included from src/libs/libgroff/curtime.cpp:21:
In file included from ./lib/string.h:41:
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/string.h:73:64:
error: use of undeclared identifier 'strchr'
char* __libcpp_strchr(const char* __s, int __c) {return (char*)strchr(__s,
__c);}
                                                               ^
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/string.h:80:75:
error: use of undeclared identifier 'strpbrk'
char* __libcpp_strpbrk(const char* __s1, const char* __s2) {return
(char*)strpbrk(__s1, __s2);}
                                                                          ^
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/string.h:87:65:
error: use of undeclared identifier 'strrchr'; did you mean 'strchr'?
char* __libcpp_strrchr(const char* __s, int __c) {return
(char*)strrchr(__s, __c);}
                                                                ^
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/string.h:75:13:
note: 'strchr' declared here
const char* strchr(const char* __s, int __c) {return __libcpp_strchr(__s,
__c);}
            ^
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/string.h:94:76:
error: use of undeclared identifier 'memchr'
void* __libcpp_memchr(const void* __s, int __c, size_t __n) {return
(void*)memchr(__s, __c, __n);}
                                                                           ^
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/string.h:101:74:
error: use of undeclared identifier 'strstr'
char* __libcpp_strstr(const char* __s1, const char* __s2) {return
(char*)strstr(__s1, __s2);}
                                                                         ^
src/libs/libgroff/curtime.cpp:43:47: error: use of undeclared identifier
'strerror'
      fatal("$SOURCE_DATE_EPOCH: strtol: %1", strerror(errno));
                                              ^
11 errors generated.
make[1]: *** [src/libs/libgroff/libgroff_a-curtime.o] Error 1
make: *** [all] Error 2


Does anybody have any idea what is going on here?  This also fails on an
older checkout of the groff git repository that I have compiled in the
past, so I speculate it is a problem with something on the Mac, rather than
with groff.  A google search did not come up with any answers.
-- 
T. Kurt Bond, tkurtbond@gmail.com, https://tkurtbond.github.io


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