Trac #22175: Sage 7.5 binaries do not build

Sage doesn't build in long (~100 chars) directories:
{{{
169625[dochtml] Error building the documentation.
169626[dochtml] Traceback (most recent call last):
169627[dochtml]   File "/home/buildbot/slave/binary_pkg/build/source/Sag
eMath/jc4b6yulaujayb9sr94ia88eourzeqip0oidmas391yaj2/local/lib/python/ru
npy.py", line 174, in _run_module_as_main
169628[dochtml]     "__main__", fname, loader, pkg_name)
169629[dochtml]   File "/home/buildbot/slave/binary_pkg/build/source/Sag
eMath/jc4b6yulaujayb9sr94ia88eourzeqip0oidmas391yaj2/local/lib/python/ru
npy.py", line 72, in _run_code
169630[dochtml]     exec code in run_globals
169631[dochtml]   File "/home/buildbot/slave/binary_pkg/build/source/Sag
eMath/jc4b6yulaujayb9sr94ia88eourzeqip0oidmas391yaj2/local/lib/python2.7
/site-packages/sage_setup/docbuild/__main__.py", line 2, in <module>
169632[dochtml]     main()
169633[dochtml]   File "/home/buildbot/slave/binary_pkg/build/source/Sag
eMath/jc4b6yulaujayb9sr94ia88eourzeqip0oidmas391yaj2/local/lib/python2.7
/site-packages/sage_setup/docbuild/__init__.py", line 1667, in main
169634[dochtml]     builder()
169635[dochtml]   File "/home/buildbot/slave/binary_pkg/build/source/Sag
eMath/jc4b6yulaujayb9sr94ia88eourzeqip0oidmas391yaj2/local/lib/python2.7
/site-packages/sage_setup/docbuild/__init__.py", line 316, in _wrapper
169636[dochtml]     getattr(get_builder(document), 'inventory')(*args,
**kwds)
169637[dochtml]   File "/home/buildbot/slave/binary_pkg/build/source/Sag
eMath/jc4b6yulaujayb9sr94ia88eourzeqip0oidmas391yaj2/local/lib/python2.7
/site-packages/sage_setup/docbuild/__init__.py", line 510, in _wrapper
169638[dochtml]     build_many(build_ref_doc, L)
169639[dochtml]   File "/home/buildbot/slave/binary_pkg/build/source/Sag
eMath/jc4b6yulaujayb9sr94ia88eourzeqip0oidmas391yaj2/local/lib/python2.7
/site-packages/sage_setup/docbuild/__init__.py", line 252, in build_many
169640[dochtml]     ret = x.get(99999)
169641[dochtml]   File "/home/buildbot/slave/binary_pkg/build/source/Sag
eMath/jc4b6yulaujayb9sr94ia88eourzeqip0oidmas391yaj2/local/lib/python/mu
ltiprocessing/pool.py", line 567, in get
169642[dochtml]     raise self._value
169643[dochtml] NameError: Singular library 'freegb.lib' not found
}}}

URL: https://trac.sagemath.org/22175
Reported by: vbraun
Ticket author(s): Volker Braun
Reviewer(s): Eric Gourgoulhon

build/pkgs/singular/patches/libnamebuf_length.patch

@@ -0,0 +1,97 @@
+Increase the hardcoded library file name buffer size
+
+See https://trac.sagemath.org/ticket/22175
+
+---
+diff --git a/Singular/fehelp.cc b/Singular/fehelp.cc
+index df00135..2fb2f5d 100644
+--- a/Singular/fehelp.cc
++++ b/Singular/fehelp.cc
+@@ -702,7 +702,7 @@ static BOOLEAN heOnlineHelp(char* s)
+     return FALSE;
+   }
+
+-  char libnamebuf[128];
++  char libnamebuf[1024];
+   FILE *fp=NULL;
+   // first, search for library of that name
+   if ((str[1]!='\0') &&
+diff --git a/Singular/iparith.cc b/Singular/iparith.cc
+index 9843bb1..a1472e8 100644
+--- a/Singular/iparith.cc
++++ b/Singular/iparith.cc
+@@ -5193,7 +5193,7 @@ BOOLEAN jjWAITALL1(leftv res, leftv u)
+
+ BOOLEAN jjLOAD(const char *s, BOOLEAN autoexport)
+ {
+-  char libnamebuf[256];
++  char libnamebuf[1024];
+   lib_types LT = type_of_LIB(s, libnamebuf);
+
+ #ifdef HAVE_DYNAMIC_LOADING
+@@ -5228,7 +5228,7 @@ BOOLEAN jjLOAD(const char *s, BOOLEAN autoexport)
+         package savepack=currPack;
+         currPack=IDPACKAGE(pl);
+         IDPACKAGE(pl)->loaded=TRUE;
+-        char libnamebuf[256];
++        char libnamebuf[1024];
+         FILE * fp = feFopen( s, "r", libnamebuf, TRUE );
+         BOOLEAN bo=iiLoadLIB(fp, libnamebuf, s, pl, autoexport, TRUE);
+         currPack=savepack;
+diff --git a/Singular/iplib.cc b/Singular/iplib.cc
+index a0fdff9..2bd6e7b 100644
+--- a/Singular/iplib.cc
++++ b/Singular/iplib.cc
+@@ -656,7 +656,7 @@ iiGetBuiltinModInit(const char* libname)
+ BOOLEAN iiTryLoadLib(leftv v, const char *id)
+ {
+   BOOLEAN LoadResult = TRUE;
+-  char libnamebuf[128];
++  char libnamebuf[1024];
+   char *libname = (char *)omAlloc(strlen(id)+5);
+   const char *suffix[] = { "", ".lib", ".so", ".sl", NULL };
+   int i = 0;
+@@ -672,7 +672,7 @@ BOOLEAN iiTryLoadLib(leftv v, const char *id)
+     {
+       char *s=omStrDup(libname);
+       #ifdef HAVE_DYNAMIC_LOADING
+-      char libnamebuf[256];
++      char libnamebuf[1024];
+       #endif
+
+       if (LT==LT_SINGULAR)
+@@ -717,7 +717,7 @@ BOOLEAN iiLocateLib(const char* lib, char* where)
+
+ BOOLEAN iiLibCmd( char *newlib, BOOLEAN autoexport, BOOLEAN tellerror, BOOLEAN force )
+ {
+-  char libnamebuf[128];
++  char libnamebuf[1024];
+   // procinfov pi;
+   // idhdl h;
+   idhdl pl;
+diff --git a/Singular/libparse.cc b/Singular/libparse.cc
+index 333999f..b468ed1 100644
+--- a/Singular/libparse.cc
++++ b/Singular/libparse.cc
+@@ -1093,7 +1093,7 @@ BOOLEAN p_static = FALSE;
+ int old_state = 0;
+ lib_cmds last_cmd = LP_NONE;
+
+-char libnamebuf[128];
++char libnamebuf[1024];
+ char *text_buffer=NULL;
+ long string_start;
+
+diff --git a/Singular/libparse.ll b/Singular/libparse.ll
+index 3cd7abc..f85bb3b 100644
+--- a/Singular/libparse.ll
++++ b/Singular/libparse.ll
+@@ -44,7 +44,7 @@ BOOLEAN p_static = FALSE;
+ int old_state = 0;
+ lib_cmds last_cmd = LP_NONE;
+
+-char libnamebuf[128];
++char libnamebuf[1024];
+ char *text_buffer=NULL;
+ long string_start;
+

build/pkgs/singular/spkg-check

@@ -0,0 +1,8 @@
+#!/usr/bin/env bash
+
+
+Singular -c 'LIB "freegb.lib"; exit;'
+if [ $? -ne 0 ]; then
+    echo >&2 "Error loading the freegb library in Singular."
+    exit 1
+fi