title: nuwen MinGW + Boost- error linking boost_regex
body: <p>I downloaded the <a href="http://nuwen.net/mingw.html" rel="nofollow">nuwen</a> distribution of MinGW, which comes with Boost (GCC 4.6.1 and Boost 1.47.0.). I want to use the Boost regex package in a c++ program. libboost_regex.a is contained in C:\dev\MinGW\lib, which is in my path as well as the library search path for MinGW. When I compile, it gives me lots and lots of errors. I tried giving it the exact path to the library in the g++ command line, but to no avail. My best attempt at compiling: <code>g++ -o test -LC:\dev\MinGW -lboost_regex testBoost.cpp</code>. The program I'm trying to run:</p>
  
  <pre><code>#include &lt;iostream&gt;
  #include &lt;boost/regex.hpp&gt;
  
  int main (int argc, char* argv[])
  {
              static const boost::regex exp ("hello regex!");
  }
  </code></pre>
  
  <p>My humongous pile of errors:</p>
  
  <pre><code>C:\Users\nate\AppData\Local\Temp\ccTuJyrB.o:testBoost.cpp:(.text$_ZN5boost9re_detail27cpp_regex_traits_char_layerIcEC2ERKNS0_21cpp_regex_traits_baseIcEE[boost::re_detail::cpp_regex_traits_char_layer&lt;char&gt;::cpp_regex_traits_char_layer(boost::re_detail::cpp_regex_traits_base&lt;char&gt; const&amp;)]+0x20): undefined reference to `boost::re_detail::cpp_regex_traits_char_layer&lt;char&gt;::init()'
  C:\Users\nate\AppData\Local\Temp\ccTuJyrB.o:testBoost.cpp:(.text$_ZN5boost9re_detail11raw_storage6extendEj[boost::re_detail::raw_storage::extend(unsigned int)]+0x41): undefined reference to `boost::re_detail::raw_storage::resize(unsigned int)'
  C:\Users\nate\AppData\Local\Temp\ccTuJyrB.o:testBoost.cpp:(.text$_ZN5boost9re_detail18basic_regex_parserIcNS_12regex_traitsIcNS_16cpp_regex_traitsIcEEEEE4failENS_15regex_constants10error_typeEiSsi[boost::re_detail::basic_regex_parser&lt;char, boost::regex_traits&lt;char, boost::cpp_regex_traits&lt;char&gt; &gt; &gt;::fail(boost::regex_constants::error_type, int, std::basic_string&lt;char, std::char_traits&lt;char&gt;, std::allocator&lt;char&gt; &gt;, int)]+0x214): undefined reference to `boost::regex_error::regex_error(std::string const&amp;, boost::regex_constants::error_type, int)'
  C:\Users\nate\AppData\Local\Temp\ccTuJyrB.o:testBoost.cpp:(.text$_ZN5boost9re_detail18basic_regex_parserIcNS_12regex_traitsIcNS_16cpp_regex_traitsIcEEEEE4failENS_15regex_constants10error_typeEiSsi[boost::re_detail::basic_regex_parser&lt;char, boost::regex_traits&lt;char, boost::cpp_regex_traits&lt;char&gt; &gt; &gt;::fail(boost::regex_constants::error_type, int, std::basic_string&lt;char, std::char_traits&lt;char&gt;, std::allocator&lt;char&gt; &gt;, int)]+0x21f): undefined reference to `boost::regex_error::raise() const'
  C:\Users\nate\AppData\Local\Temp\ccTuJyrB.o:testBoost.cpp:(.text$_ZN5boost9re_detail18basic_regex_parserIcNS_12regex_traitsIcNS_16cpp_regex_traitsIcEEEEE4failENS_15regex_constants10error_typeEiSsi[boost::re_detail::basic_regex_parser&lt;char, boost::regex_traits&lt;char, boost::cpp_regex_traits&lt;char&gt; &gt; &gt;::fail(boost::regex_constants::error_type, int, std::basic_string&lt;char, std::char_traits&lt;char&gt;, std::allocator&lt;char&gt; &gt;, int)]+0x22a): undefined reference to `boost::regex_error::~regex_error()'
  C:\Users\nate\AppData\Local\Temp\ccTuJyrB.o:testBoost.cpp:(.text$_ZN5boost9re_detail18basic_regex_parserIcNS_12regex_traitsIcNS_16cpp_regex_traitsIcEEEEE4failENS_15regex_constants10error_typeEiSsi[boost::re_detail::basic_regex_parser&lt;char, boost::regex_traits&lt;char, boost::cpp_regex_traits&lt;char&gt; &gt; &gt;::fail(boost::regex_constants::error_type, int, std::basic_string&lt;char, std::char_traits&lt;char&gt;, std::allocator&lt;char&gt; &gt;, int)]+0x285): undefined reference to `boost::regex_error::~regex_error()'
  C:\Users\nate\AppData\Local\Temp\ccTuJyrB.o:testBoost.cpp:(.text$_ZN5boost9re_detail19basic_regex_creatorIcNS_12regex_traitsIcNS_16cpp_regex_traitsIcEEEEE16fixup_recursionsEPNS0_14re_syntax_baseE[boost::re_detail::basic_regex_creator&lt;char, boost::regex_traits&lt;char, boost::cpp_regex_traits&lt;char&gt; &gt; &gt;::fixup_recursions(boost::re_detail::re_syntax_base*)]+0x109): undefined reference to `boost::regex_error::regex_error(std::string const&amp;, boost::regex_constants::error_type, int)'
  C:\Users\nate\AppData\Local\Temp\ccTuJyrB.o:testBoost.cpp:(.text$_ZN5boost9re_detail19basic_regex_creatorIcNS_12regex_traitsIcNS_16cpp_regex_traitsIcEEEEE16fixup_recursionsEPNS0_14re_syntax_baseE[boost::re_detail::basic_regex_creator&lt;char, boost::regex_traits&lt;char, boost::cpp_regex_traits&lt;char&gt; &gt; &gt;::fixup_recursions(boost::re_detail::re_syntax_base*)]+0x114): undefined reference to `boost::regex_error::raise() const'
  C:\Users\nate\AppData\Local\Temp\ccTuJyrB.o:testBoost.cpp:(.text$_ZN5boost9re_detail19basic_regex_creatorIcNS_12regex_traitsIcNS_16cpp_regex_traitsIcEEEEE16fixup_recursionsEPNS0_14re_syntax_baseE[boost::re_detail::basic_regex_creator&lt;char, boost::regex_traits&lt;char, boost::cpp_regex_traits&lt;char&gt; &gt; &gt;::fixup_recursions(boost::re_detail::re_syntax_base*)]+0x11f): undefined reference to `boost::regex_error::~regex_error()'
  C:\Users\nate\AppData\Local\Temp\ccTuJyrB.o:testBoost.cpp:(.text$_ZN5boost9re_detail19basic_regex_creatorIcNS_12regex_traitsIcNS_16cpp_regex_traitsIcEEEEE16fixup_recursionsEPNS0_14re_syntax_baseE[boost::re_detail::basic_regex_creator&lt;char, boost::regex_traits&lt;char, boost::cpp_regex_traits&lt;char&gt; &gt; &gt;::fixup_recursions(boost::re_detail::re_syntax_base*)]+0x2e0): undefined reference to `boost::regex_error::regex_error(std::string const&amp;, boost::regex_constants::error_type, int)'
  C:\Users\nate\AppData\Local\Temp\ccTuJyrB.o:testBoost.cpp:(.text$_ZN5boost9re_detail19basic_regex_creatorIcNS_12regex_traitsIcNS_16cpp_regex_traitsIcEEEEE16fixup_recursionsEPNS0_14re_syntax_baseE[boost::re_detail::basic_regex_creator&lt;char, boost::regex_traits&lt;char, boost::cpp_regex_traits&lt;char&gt; &gt; &gt;::fixup_recursions(boost::re_detail::re_syntax_base*)]+0x2eb): undefined reference to `boost::regex_error::raise() const'
  C:\Users\nate\AppData\Local\Temp\ccTuJyrB.o:testBoost.cpp:(.text$_ZN5boost9re_detail19basic_regex_creatorIcNS_12regex_traitsIcNS_16cpp_regex_traitsIcEEEEE16fixup_recursionsEPNS0_14re_syntax_baseE[boost::re_detail::basic_regex_creator&lt;char, boost::regex_traits&lt;char, boost::cpp_regex_traits&lt;char&gt; &gt; &gt;::fixup_recursions(boost::re_detail::re_syntax_base*)]+0x2f6): undefined reference to `boost::regex_error::~regex_error()'
  C:\Users\nate\AppData\Local\Temp\ccTuJyrB.o:testBoost.cpp:(.text$_ZN5boost9re_detail19basic_regex_creatorIcNS_12regex_traitsIcNS_16cpp_regex_traitsIcEEEEE16fixup_recursionsEPNS0_14re_syntax_baseE[boost::re_detail::basic_regex_creator&lt;char, boost::regex_traits&lt;char, boost::cpp_regex_traits&lt;char&gt; &gt; &gt;::fixup_recursions(boost::re_detail::re_syntax_base*)]+0x345): undefined reference to `boost::regex_error::~regex_error()'
  C:\Users\nate\AppData\Local\Temp\ccTuJyrB.o:testBoost.cpp:(.text$_ZN5boost9re_detail19basic_regex_creatorIcNS_12regex_traitsIcNS_16cpp_regex_traitsIcEEEEE16fixup_recursionsEPNS0_14re_syntax_baseE[boost::re_detail::basic_regex_creator&lt;char, boost::regex_traits&lt;char, boost::cpp_regex_traits&lt;char&gt; &gt; &gt;::fixup_recursions(boost::re_detail::re_syntax_base*)]+0x382): undefined reference to `boost::regex_error::~regex_error()'
  C:\Users\nate\AppData\Local\Temp\ccTuJyrB.o:testBoost.cpp:(.text$_ZN5boost9re_detail19basic_regex_creatorIcNS_12regex_traitsIcNS_16cpp_regex_traitsIcEEEEE16create_startmapsEPNS0_14re_syntax_baseE[boost::re_detail::basic_regex_creator&lt;char, boost::regex_traits&lt;char, boost::cpp_regex_traits&lt;char&gt; &gt; &gt;::create_startmaps(boost::re_detail::re_syntax_base*)]+0x179): undefined reference to `boost::regex_error::regex_error(std::string const&amp;, boost::regex_constants::error_type, int)'
  C:\Users\nate\AppData\Local\Temp\ccTuJyrB.o:testBoost.cpp:(.text$_ZN5boost9re_detail19basic_regex_creatorIcNS_12regex_traitsIcNS_16cpp_regex_traitsIcEEEEE16create_startmapsEPNS0_14re_syntax_baseE[boost::re_detail::basic_regex_creator&lt;char, boost::regex_traits&lt;char, boost::cpp_regex_traits&lt;char&gt; &gt; &gt;::create_startmaps(boost::re_detail::re_syntax_base*)]+0x184): undefined reference to `boost::regex_error::raise() const'
  C:\Users\nate\AppData\Local\Temp\ccTuJyrB.o:testBoost.cpp:(.text$_ZN5boost9re_detail19basic_regex_creatorIcNS_12regex_traitsIcNS_16cpp_regex_traitsIcEEEEE16create_startmapsEPNS0_14re_syntax_baseE[boost::re_detail::basic_regex_creator&lt;char, boost::regex_traits&lt;char, boost::cpp_regex_traits&lt;char&gt; &gt; &gt;::create_startmaps(boost::re_detail::re_syntax_base*)]+0x18f): undefined reference to `boost::regex_error::~regex_error()'
  C:\Users\nate\AppData\Local\Temp\ccTuJyrB.o:testBoost.cpp:(.text$_ZN5boost9re_detail19basic_regex_creatorIcNS_12regex_traitsIcNS_16cpp_regex_traitsIcEEEEE16create_startmapsEPNS0_14re_syntax_baseE[boost::re_detail::basic_regex_creator&lt;char, boost::regex_traits&lt;char, boost::cpp_regex_traits&lt;char&gt; &gt; &gt;::create_startmaps(boost::re_detail::re_syntax_base*)]+0x2d6): undefined reference to `boost::regex_error::~regex_error()'
  C:\Users\nate\AppData\Local\Temp\ccTuJyrB.o:testBoost.cpp:(.text$_ZN5boost9re_detail19basic_regex_creatorIcNS_12regex_traitsIcNS_16cpp_regex_traitsIcEEEEE15create_startmapEPNS0_14re_syntax_baseEPhPjh[boost::re_detail::basic_regex_creator&lt;char, boost::regex_traits&lt;char, boost::cpp_regex_traits&lt;char&gt; &gt; &gt;::create_startmap(boost::re_detail::re_syntax_base*, unsigned char*, unsigned int*, unsigned char)]+0x23d): undefined reference to `boost::regex_error::regex_error(std::string const&amp;, boost::regex_constants::error_type, int)'
  C:\Users\nate\AppData\Local\Temp\ccTuJyrB.o:testBoost.cpp:(.text$_ZN5boost9re_detail19basic_regex_creatorIcNS_12regex_traitsIcNS_16cpp_regex_traitsIcEEEEE15create_startmapEPNS0_14re_syntax_baseEPhPjh[boost::re_detail::basic_regex_creator&lt;char, boost::regex_traits&lt;char, boost::cpp_regex_traits&lt;char&gt; &gt; &gt;::create_startmap(boost::re_detail::re_syntax_base*, unsigned char*, unsigned int*, unsigned char)]+0x248): undefined reference to `boost::regex_error::raise() const'
  C:\Users\nate\AppData\Local\Temp\ccTuJyrB.o:testBoost.cpp:(.text$_ZN5boost9re_detail19basic_regex_creatorIcNS_12regex_traitsIcNS_16cpp_regex_traitsIcEEEEE15create_startmapEPNS0_14re_syntax_baseEPhPjh[boost::re_detail::basic_regex_creator&lt;char, boost::regex_traits&lt;char, boost::cpp_regex_traits&lt;char&gt; &gt; &gt;::create_startmap(boost::re_detail::re_syntax_base*, unsigned char*, unsigned int*, unsigned char)]+0x253): undefined reference to `boost::regex_error::~regex_error()'
  C:\Users\nate\AppData\Local\Temp\ccTuJyrB.o:testBoost.cpp:(.text$_ZN5boost9re_detail19basic_regex_creatorIcNS_12regex_traitsIcNS_16cpp_regex_traitsIcEEEEE15create_startmapEPNS0_14re_syntax_baseEPhPjh[boost::re_detail::basic_regex_creator&lt;char, boost::regex_traits&lt;char, boost::cpp_regex_traits&lt;char&gt; &gt; &gt;::create_startmap(boost::re_detail::re_syntax_base*, unsigned char*, unsigned int*, unsigned char)]+0x947): undefined reference to `boost::regex_error::~regex_error()'
  C:\Users\nate\AppData\Local\Temp\ccTuJyrB.o:testBoost.cpp:(.text$_ZNK5boost9re_detail31cpp_regex_traits_implementationIcE12error_stringENS_15regex_constants10error_typeE[boost::re_detail::cpp_regex_traits_implementation&lt;char&gt;::error_string(boost::regex_constants::error_type) const]+0x89): undefined reference to `boost::re_detail::get_default_error_string(boost::regex_constants::error_type)'
  C:\Users\nate\AppData\Local\Temp\ccTuJyrB.o:testBoost.cpp:(.text$_ZNK5boost9re_detail31cpp_regex_traits_implementationIcE12error_stringENS_15regex_constants10error_typeE[boost::re_detail::cpp_regex_traits_implementation&lt;char&gt;::error_string(boost::regex_constants::error_type) const]+0xe7): undefined reference to `boost::re_detail::get_default_error_string(boost::regex_constants::error_type)'
  C:\Users\nate\AppData\Local\Temp\ccTuJyrB.o:testBoost.cpp:(.text$_ZN5boost9re_detail19basic_regex_creatorIcNS_12regex_traitsIcNS_16cpp_regex_traitsIcEEEEE12insert_stateEiNS0_19syntax_element_typeEj[boost::re_detail::basic_regex_creator&lt;char, boost::regex_traits&lt;char, boost::cpp_regex_traits&lt;char&gt; &gt; &gt;::insert_state(int, boost::re_detail::syntax_element_type, unsigned int)]+0x94): undefined reference to `boost::re_detail::raw_storage::insert(unsigned int, unsigned int)'
  C:\Users\nate\AppData\Local\Temp\ccTuJyrB.o:testBoost.cpp:(.text$_ZN5boost12object_cacheINS_9re_detail21cpp_regex_traits_baseIcEENS1_31cpp_regex_traits_implementationIcEEE3getERKS3_j[boost::object_cache&lt;boost::re_detail::cpp_regex_traits_base&lt;char&gt;, boost::re_detail::cpp_regex_traits_implementation&lt;char&gt; &gt;::get(boost::re_detail::cpp_regex_traits_base&lt;char&gt; const&amp;, unsigned int)]+0x1e): undefined reference to `boost::scoped_static_mutex_lock::scoped_static_mutex_lock(boost::static_mutex&amp;, bool)'
  C:\Users\nate\AppData\Local\Temp\ccTuJyrB.o:testBoost.cpp:(.text$_ZN5boost12object_cacheINS_9re_detail21cpp_regex_traits_baseIcEENS1_31cpp_regex_traits_implementationIcEEE3getERKS3_j[boost::object_cache&lt;boost::re_detail::cpp_regex_traits_base&lt;char&gt;, boost::re_detail::cpp_regex_traits_implementation&lt;char&gt; &gt;::get(boost::re_detail::cpp_regex_traits_base&lt;char&gt; const&amp;, unsigned int)]+0x59): undefined reference to `boost::scoped_static_mutex_lock::~scoped_static_mutex_lock()'
  C:\Users\nate\AppData\Local\Temp\ccTuJyrB.o:testBoost.cpp:(.text$_ZN5boost12object_cacheINS_9re_detail21cpp_regex_traits_baseIcEENS1_31cpp_regex_traits_implementationIcEEE3getERKS3_j[boost::object_cache&lt;boost::re_detail::cpp_regex_traits_base&lt;char&gt;, boost::re_detail::cpp_regex_traits_implementation&lt;char&gt; &gt;::get(boost::re_detail::cpp_regex_traits_base&lt;char&gt; const&amp;, unsigned int)]+0xdf): undefined reference to `boost::scoped_static_mutex_lock::~scoped_static_mutex_lock()'
  C:\Users\nate\AppData\Local\Temp\ccTuJyrB.o:testBoost.cpp:(.text$_ZNK5boost9re_detail31cpp_regex_traits_implementationIcE18lookup_collatenameEPKcS4_[boost::re_detail::cpp_regex_traits_implementation&lt;char&gt;::lookup_collatename(char const*, char const*) const]+0x10f): undefined reference to `boost::re_detail::lookup_default_collate_name(std::string const&amp;)'
  C:\Users\nate\AppData\Local\Temp\ccTuJyrB.o:testBoost.cpp:(.text$_ZN5boost9re_detail31cpp_regex_traits_implementationIcE4initEv[boost::re_detail::cpp_regex_traits_implementation&lt;char&gt;::init()]+0xe3): undefined reference to `boost::re_detail::raise_runtime_error(std::runtime_error const&amp;)'
  C:\Users\nate\AppData\Local\Temp\ccTuJyrB.o:testBoost.cpp:(.text$_ZN5boost9re_detail31cpp_regex_traits_implementationIcE4initEv[boost::re_detail::cpp_regex_traits_implementation&lt;char&gt;::init()]+0x11a): undefined reference to `boost::re_detail::get_default_error_string(boost::regex_constants::error_type)'
  C:\Users\nate\AppData\Local\Temp\ccTuJyrB.o:testBoost.cpp:(.text$_ZN5boost16cpp_regex_traitsIcE16get_catalog_nameEv[boost::cpp_regex_traits&lt;char&gt;::get_catalog_name()]+0x1f): undefined reference to `boost::scoped_static_mutex_lock::scoped_static_mutex_lock(boost::static_mutex&amp;, bool)'
  C:\Users\nate\AppData\Local\Temp\ccTuJyrB.o:testBoost.cpp:(.text$_ZN5boost16cpp_regex_traitsIcE16get_catalog_nameEv[boost::cpp_regex_traits&lt;char&gt;::get_catalog_name()]+0x3e): undefined reference to `boost::scoped_static_mutex_lock::~scoped_static_mutex_lock()'
  C:\Users\nate\AppData\Local\Temp\ccTuJyrB.o:testBoost.cpp:(.text$_ZN5boost16cpp_regex_traitsIcE16get_catalog_nameEv[boost::cpp_regex_traits&lt;char&gt;::get_catalog_name()]+0x56): undefined reference to `boost::scoped_static_mutex_lock::~scoped_static_mutex_lock()'
  collect2: ld returned 1 exit status
  </code></pre>
  
  <p><b>Edit:</b> As suggested by Michael Burr, I ran g++ -Wl --verbose. Here is the output from it:</p>
  
  <pre><code>Using built-in specs.
  COLLECT_GCC=g++
  COLLECT_LTO_WRAPPER=c:/dev/mingw/bin/../libexec/gcc/i686-pc-mingw32/4.6.1/lto-wrapper.exe
  Target: i686-pc-mingw32
  Configured with: ../src/configure --prefix=/c/temp/gcc/dest --enable-languages=c,c++ --with-arch=i686 --with-tune=generic --disable-libstdcxx-pch --disable-nls --disable-shared --disable-sjlj-exceptions --disable-win32-registry --enable-checking=release --disable-lto
  Thread model: win32
  gcc version 4.6.1 (GCC) 
  COLLECT_GCC_OPTIONS='-o' 'test.exe' '-Wl' '-v' '-LC:\dev\MinGW\' '-mtune=generic' '-march=i686'
   c:/dev/mingw/bin/../libexec/gcc/i686-pc-mingw32/4.6.1/cc1plus.exe -quiet -v -iprefix c:\dev\mingw\bin\../lib/gcc/i686-pc-mingw32/4.6.1/ testBoost.cpp -quiet -dumpbase testBoost.cpp -mtune=generic -march=i686 -auxbase testBoost -Wl -version -o C:\Users\nate\AppData\Local\Temp\ccX1SmTk.s
  cc1plus.exe: error: unrecognized command line option '-Wl'
  GNU C++ (GCC) version 4.6.1 (i686-pc-mingw32)
      compiled by GNU C version 4.6.1, GMP version 5.0.2, MPFR version 3.0.1-p4, MPC version 0.9
  GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
  ignoring nonexistent directory "c:\dev\mingw\bin\../lib/gcc/i686-pc-mingw32/4.6.1/../../../../i686-pc-mingw32/include"
  ignoring duplicate directory "c:/dev/mingw/lib/gcc/../../lib/gcc/i686-pc-mingw32/4.6.1/../../../../include/c++/4.6.1"
  ignoring duplicate directory "c:/dev/mingw/lib/gcc/../../lib/gcc/i686-pc-mingw32/4.6.1/../../../../include/c++/4.6.1/i686-pc-mingw32"
  ignoring duplicate directory "c:/dev/mingw/lib/gcc/../../lib/gcc/i686-pc-mingw32/4.6.1/../../../../include/c++/4.6.1/backward"
  ignoring duplicate directory "c:/dev/mingw/lib/gcc/../../lib/gcc/i686-pc-mingw32/4.6.1/include"
  ignoring nonexistent directory "c:/temp/gcc/dest/include"
  ignoring nonexistent directory "/c/temp/gcc/dest/include"
  ignoring duplicate directory "c:/dev/mingw/lib/gcc/../../lib/gcc/i686-pc-mingw32/4.6.1/include-fixed"
  ignoring nonexistent directory "c:/dev/mingw/lib/gcc/../../lib/gcc/i686-pc-mingw32/4.6.1/../../../../i686-pc-mingw32/include"
  ignoring nonexistent directory "/mingw/include"
  #include "..." search starts here:
  #include &lt;...&gt; search starts here:
   c:\dev\mingw\bin\../lib/gcc/i686-pc-mingw32/4.6.1/../../../../include/c++/4.6.1
   c:\dev\mingw\bin\../lib/gcc/i686-pc-mingw32/4.6.1/../../../../include/c++/4.6.1/i686-pc-mingw32
   c:\dev\mingw\bin\../lib/gcc/i686-pc-mingw32/4.6.1/../../../../include/c++/4.6.1/backward
   c:\dev\mingw\bin\../lib/gcc/i686-pc-mingw32/4.6.1/include
   c:\dev\mingw\bin\../lib/gcc/i686-pc-mingw32/4.6.1/../../../../include
   c:\dev\mingw\bin\../lib/gcc/i686-pc-mingw32/4.6.1/include-fixed
  End of search list.
  GNU C++ (GCC) version 4.6.1 (i686-pc-mingw32)
      compiled by GNU C version 4.6.1, GMP version 5.0.2, MPFR version 3.0.1-p4, MPC version 0.9
  GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
  </code></pre>