On 11/28/19 11:11 PM, Bruno Haible wrote:
> Hi Dagobert,
> 
>  lib/gnulib.mk there is a suspicious addition to libgnu_la_LDFLAGS without 
> space:
>>
>> libgnu_la_LDFLAGS += $(GETADDRINFO_LIB)$(LTLIBINTL)
>> ...
>> libgnu_la_LDFLAGS += $(LTLIBICONV)
>> libgnu_la_LDFLAGS += $(LTLIBINTL)
>> libgnu_la_LDFLAGS += $(LTLIBMULTITHREAD)
>> ```
>>
>> The file `lib/gnulib.mk` is generated during bootstrap. 
>>
>> What is actually executed during bootstrap is
>>
>> gnulib/gnulib-tool.py --no-changelog --aux-dir=build-aux --doc-base=doc 
>> --lib=libgnu --m4-base=m4/ --source-base=lib/ --tests-base=lib/tests 
>> --local-dir=gl --makefile-name=gnulib.mk --libtool --import accept access 
>> arpa_inet atoll bind c-strcase c-strcasestr c-ctype calloc-posix 
>> canonicalize-lgpl clock-time close closedir cond connect crypto/md2 
>> crypto/md5 crypto/sha1 crypto/sha256 crypto/sha512 dirname dup dup2 errno 
>> fclose fcntl fdopen fflush flock fnmatch-gnu fopen freopen fstat fsync 
>> ftruncate futimens getaddrinfo getpass getsockname gettext-h gettime 
>> gitlog-to-changelog glob iconv inet_pton inline inttypes ioctl isatty 
>> lib-symbol-visibility limits-h link listen lock maintainer-makefile 
>> malloc-posix memchr mkdir mkstemp msvc-nothrow nanosleep netdb netinet_in 
>> nl_langinfo open opendir pclose pipe-posix progname popen poll posix_spawn 
>> pwrite qsort_r random_r read readdir realloc-posix recv recvfrom regex 
>> rename safe-read safe-write select send sendto servent setlocale setsockopt 
>> socket sockets socklen spawn-pipe stdarg stdbool stddef stdint stat strcase 
>> strchrnul strdup-posix strerror strndup strpbrk strstr strtoll sys_file 
>> sys_socket sys_stat sys_time sys_types sys_uio thread time_r unistd unlink 
>> update-copyright warnings wcwidth write xgethostname
>>
>> and this command reproduces the error in `lib/gnulib.mk`
> 
> Thanks for the test case. When I run this command
>   - once with gnulib-tool (shell script),
>   - once with gnulib-tool.py,
> I see these differences in the generated lib/gnulib.mk:
> 
> @@ -168,7 +35,7 @@
>  EXTRA_libgnu_la_SOURCES =
>  libgnu_la_LDFLAGS = $(AM_LDFLAGS)
>  libgnu_la_LDFLAGS += -no-undefined
> -libgnu_la_LDFLAGS += $(GETADDRINFO_LIB)
> +libgnu_la_LDFLAGS += $(GETADDRINFO_LIB)$(LTLIBINTL)
>  libgnu_la_LDFLAGS += $(GETHOSTNAME_LIB)
>  libgnu_la_LDFLAGS += $(HOSTENT_LIB)
>  libgnu_la_LDFLAGS += $(INET_NTOP_LIB)
> @@ -187,7 +54,7 @@
>  libgnu_la_LDFLAGS += $(LTLIBMULTITHREAD)
>  libgnu_la_LDFLAGS += $(LTLIBTHREAD)
>  libgnu_la_LDFLAGS += $(SERVENT_LIB)
> -libgnu_la_LDFLAGS += @INTL_MACOSX_LIBS@
> +libgnu_la_LDFLAGS += @INTL_MACOSX_LIBS@$(LTLIBTHREAD)
>  
>  ## begin gnulib module absolute-header
>  
> Lines 
> libgnu_la_LDFLAGS += $(LTLIBINTL)
> and
> libgnu_la_LDFLAGS += $(LTLIBTHREAD)
> are already part of the output. Therefore the right fix is not to insert a
> space, but to have gnulib-tool.py generate the same lines as the shell script.
> 
> FYI, in the shell script it is the line gnulib-tool:3856.

Attached is a diff for review that fixes the issue.

Indeed the 'space fix' above only worked for
Link:
$(LIB1)
$(LIB2) optional comment

The diff fixes this to also allow (even if not found in modules yet)
Link:
$(LIB1) optional comment 1
$(LIB2) optional comment 2

Then, the double $([LT]LIB...) entries are removed and sorted as
gnulib-tool does it by 'sort -u'.

Please review the patch - surely some of my python constructs could be
done more elegant.

Regards, Tim
diff --git a/pygnulib/GLEmiter.py b/pygnulib/GLEmiter.py
index a350ba753..f0746f827 100644
--- a/pygnulib/GLEmiter.py
+++ b/pygnulib/GLEmiter.py
@@ -853,17 +853,18 @@ AC_DEFUN([%V1%_LIBSOURCES], [
             emit += '%s_%s_LDFLAGS += -no-undefined\n' % (libname, libext)
             # Synthesize an ${libname}_${libext}_LDFLAGS augmentation by combining
             # the link dependencies of all modules.
-            listing = list()
             links = [module.getLink()
                      for module in modules if not module.isTests()]
+            ulinks = list()
             for link in links:
-                link = constants.nlremove(link)
-                position = link.find(' when linking with libtool')
-                if position != -1:
-                    link = link[:position]
-                listing += [link]
-            listing = sorted(set([link for link in listing if link != '']))
-            for link in listing:
+                for lib in link:
+                    lib = constants.nlremove(lib)
+                    position = lib.find(' when linking with libtool')
+                    if position != -1:
+                        lib = lib[:position]
+                    ulinks += [lib]
+            ulinks = sorted(set(ulinks))
+            for link in ulinks:
                 emit += '%s_%s_LDFLAGS += %s\n' % (libname, libext, link)
         emit += '\n'
         if pobase:
diff --git a/pygnulib/GLImport.py b/pygnulib/GLImport.py
index 19ade5e8d..27a01be43 100644
--- a/pygnulib/GLImport.py
+++ b/pygnulib/GLImport.py
@@ -1374,13 +1374,17 @@ for the following .h files.')
 
         # Get link directives.
         links = [module.getLink() for module in self.moduletable['main']]
-        links = sorted(set([link for link in links if link.strip()]))
-        if links:
+        ulinks = list()
+        for link in links:
+            for lib in link:
+                ulinks += [lib]
+        ulinks = sorted(set(ulinks))
+        if ulinks:
             print('''
 You may need to use the following Makefile variables when linking.
 Use them in <program>_LDADD when linking a program, or
 in <library>_a_LDFLAGS or <library>_la_LDFLAGS when linking a library.''')
-            for link in links:
+            for link in ulinks:
                 print('  %s' % link)
 
         # Print reminders.
diff --git a/pygnulib/GLModuleSystem.py b/pygnulib/GLModuleSystem.py
index f2f9df4ac..9560bc273 100644
--- a/pygnulib/GLModuleSystem.py
+++ b/pygnulib/GLModuleSystem.py
@@ -791,13 +791,11 @@ Include:|Link:|License:|Maintainer:)'
         Return link directive.'''
         section = 'Link:'
         if 'link' not in self.cache:
-            if section not in self.content:
-                result = string()
-            else:  # if section in self.content
+            parts = list()
+            if section in self.content:
                 snippet = self.content.split(section)[-1]
                 snippet = snippet.replace('\r\n', '\n')
                 lines = ['%s\n' % line for line in snippet.split('\n')]
-                parts = list()
                 for line in lines:
                     regex = '^(Description|Comment|Status|Notice|Applicability|'
                     regex += 'Files|Depends-on|configure\\.ac-early|configure\\.ac|'
@@ -808,8 +806,8 @@ Include:|Link:|License:|Maintainer:)'
                         break
                     parts += [line]
                 parts = [part.strip() for part in parts if part.strip()]
-                result = ''.join(parts)
-            self.cache['link'] = result
+                # result = ' '.join(parts)
+            self.cache['link'] = parts
         return(self.cache['link'])
 
     def getLicense(self):

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