From 8bbf908ab1afd341e361dd5ad0c37f3c1b9a6635 Mon Sep 17 00:00:00 2001
From: Mike Buland <eichlan@xagasoft.com>
Date: Fri, 28 Nov 2014 17:38:56 +0000
Subject: Autoconfig now detects libraries that libbu++ can use and generates
 the appropriate headers. bin2cpp now uses those headers to compile correctly
 despite having missing filters.

---
 autoconfig.cpp        | 32 +++++++++++++++++++++++++++++++
 src/tools/bin2cpp.cpp | 53 ++++++++++++++++++++++++++++++++++++++++-----------
 2 files changed, 74 insertions(+), 11 deletions(-)

diff --git a/autoconfig.cpp b/autoconfig.cpp
index 28362ec..9d09412 100644
--- a/autoconfig.cpp
+++ b/autoconfig.cpp
@@ -13,6 +13,35 @@ bool testCpp( const char *prog )
     return pclose(pop) == 0;
 }
 
+bool testLib( const char *lib, const char *symname, const char *humname )
+{
+    printf("Detecting library %s (-l%s)...", humname, lib );
+    fflush( stdout );
+    static const char *prog = "int main () { return 0; }";
+    char *cmdline = (char *)malloc( 29+strlen(lib) );
+    strcpy( cmdline, "g++ -x c++ -l");
+    strcat( cmdline, lib );
+    strcat( cmdline, " - -o /dev/null");
+
+    FILE *pop = popen( cmdline, "w");
+    fwrite( prog, 1, strlen( prog ), pop );
+    free( cmdline );
+    if( pclose(pop) == 0 )
+    {
+        printf("found.\n");
+        fprintf( fOut, "#define BU_FEATURE_%s 1\n", symname );
+        fprintf( fOut, "#define BU_HAS_%s\n", symname );
+        return false;
+    }
+    else
+    {
+        printf("missing.\n");
+        fprintf( fOut, "#define BU_FEATURE_%s 0\n", symname );
+        fprintf( fOut, "#define BU_MISSING_%s\n", symname );
+        return true;
+    }
+}
+
 void detectEndianness()
 {
     printf("Detecting endian support...");
@@ -59,6 +88,9 @@ int main( int argc, char *argv[] )
             );
 
         detectEndianness();
+        testLib("z", "DEFLATE", "Deflate");
+        testLib("bz2", "BZIP2", "BZip2");
+        testLib("lzma", "LZMA", "Lzma");
 
         fprintf( fOut, "#endif\n");
     }
diff --git a/src/tools/bin2cpp.cpp b/src/tools/bin2cpp.cpp
index cd57086..e0eab28 100644
--- a/src/tools/bin2cpp.cpp
+++ b/src/tools/bin2cpp.cpp
@@ -5,9 +5,16 @@
 #include <bu/strfilter.h>
 #include <bu/taf.h>
 
+#ifdef BU_HAS_DEFLATE
 #include <bu/deflate.h>
+#endif
+#ifdef BU_HAS_BZIP2
 #include <bu/bzip2.h>
+#endif
+#ifdef BU_HAS_LZMA
 #include <bu/lzma.h>
+#endif
+
 #include <bu/base64.h>
 #include <bu/hex.h>
 
@@ -26,7 +33,17 @@ public:
         addOption( sClass, 'c', "Class name [default=\"Datafiles\"]");
         addOption( sOutBase, 'o', "Output base filename [defaults to classname]");
         addOption( sOutDir, 'd', "Output directory [defaults to current dir]");
-        addOption( slot(this, &Options::addFilter), 'f', "Add filter: deflate, bzip2, lzma, base64, hex");
+        addOption( slot(this, &Options::addFilter), 'f', "Add filter: "
+#ifdef BU_HAS_DEFLATE
+            "deflate, "
+#endif
+#ifdef BU_HAS_BZIP2
+            "bzip2, "
+#endif
+#ifdef BU_HAS_LZMA
+            "lzma, "
+#endif
+            "base64, hex");
         addOption( sSpecFile, 's', "Use the specified spec file instead of providing options on the command line.  If you use this option all others are ignored.");
         setNonOption( slot(this, &Options::addInput) );
         addHelpOption();
@@ -115,15 +132,22 @@ int main( int argc, char *argv[] )
         << "};" << fHdr.nl << fHdr.nl;
     fHdr << "#endif";
 
-    fSrc << "#include \"" << opt.sOutBase << ".h\"" << fSrc.nl 
-        << "#include <bu/deflate.h>" << fSrc.nl
-        << "#include <bu/bzip2.h>" << fSrc.nl
-        << "#include <bu/base64.h>" << fSrc.nl
-        << "#include <bu/lzma.h>" << fSrc.nl
-        << "#include <bu/hex.h>" << fSrc.nl
-        << "#include <bu/strfilter.h>" << fSrc.nl
-        << "#include <bu/staticmembuf.h>" << fSrc.nl << fSrc.nl
-        << "const " << opt.sClass << "::File " << opt.sClass << "::aFile[] = {" << fSrc.nl;
+    fSrc << "#include \"" << opt.sOutBase << ".h\"" << fSrc.nl;
+#ifdef BU_HAS_DEFLATE
+    fSrc << "#include <bu/deflate.h>" << fSrc.nl;
+#endif
+#ifdef BU_HAS_BZIP2
+    fSrc << "#include <bu/bzip2.h>" << fSrc.nl;
+#endif
+#ifdef BU_HAS_LZMA
+    fSrc << "#include <bu/lzma.h>" << fSrc.nl;
+#endif
+    fSrc << "#include <bu/base64.h>" << fSrc.nl;
+    fSrc << "#include <bu/hex.h>" << fSrc.nl;
+    fSrc << "#include <bu/strfilter.h>" << fSrc.nl;
+    fSrc << "#include <bu/staticmembuf.h>" << fSrc.nl;
+    fSrc << fSrc.nl;
+    fSrc << "const " << opt.sClass << "::File " << opt.sClass << "::aFile[] = {" << fSrc.nl;
 
     for( Bu::StringList::iterator i = opt.slInput.begin(); i; i++ )
     {
@@ -138,24 +162,31 @@ int main( int argc, char *argv[] )
         Bu::String sFltDesc;
         for( Bu::StringList::iterator f = opt.slFilter.begin(); f; f++ )
         {
-            if( *f == "deflate" )
+            if( false ) { } // should optomize out
+#ifdef BU_HAS_DEFLATE
+            else if( *f == "deflate" )
             {
                 sDat = encodeStr<Deflate>( sDat );
                 sFltDesc.prepend("d");
                 hFilters.insert('d', true );
             }
+#endif
+#ifdef BU_HAS_BZIP2
             else if( *f == "bzip2" )
             {
                 sDat = encodeStr<BZip2>( sDat );
                 sFltDesc.prepend("b");
                 hFilters.insert('b', true );
             }
+#endif
+#ifdef BU_HAS_LZMA
             else if( *f == "lzma" )
             {
                 sDat = encodeStr<Lzma>( sDat );
                 sFltDesc.prepend("l");
                 hFilters.insert('l', true );
             }
+#endif
             else if( *f == "base64" )
             {
                 sDat = encodeStr<Base64>( sDat );
-- 
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