# Linux compile with gcc-6.3: possible?

**URL:** <https://discourse.mc-stan.org/t/linux-compile-with-gcc-6-3-possible/6401>\
**Category:** General\
**Created:** [November 7, 2018, 9:29pm UTC](https://discourse.mc-stan.org/t/linux-compile-with-gcc-6-3-possible/6401 "2018-11-07T21:29:13Z")\
**Posts on this page:** 4\
**Page:** 1

<div class="post-metadata">

**Author:** ![pauljohn32](https://avatars.discourse-cdn.com/v4/letter/p/a8b319/32.png) [@pauljohn32](https://discourse.mc-stan.org/u/pauljohn32)\
**Post date:** [November 7, 2018, 9:29pm UTC](https://discourse.mc-stan.org/t/linux-compile-with-gcc-6-3-possible/6401/1 "2018-11-07T21:29:13Z")

</div>

I’ve not been able to compile rstan for a while, but am making another run at it today. I’ve tried every few months…

On the cluster computing system, we have RedHat 6 with various package updates. The R is Microsoft R and the gcc I’ve got is 6.3. The toolchain test on ([C++14 standard requested but CXX14 is not defined - #3 by Jean\_Billie](https://discourse.mc-stan.org/t/c-14-standard-requested-but-cxx14-is-not-defined/5998/3)) succeeds.

I’ve replaced ~/.R/Makevars with the latest advice I find in your page:

```
$ cat ~/.R/Makevars
CXX14FLAGS=-O3 -mtune=native -march=native -Wno-unused-variable -Wno-unused-function -fPIC
CXX14 = g++ # could also you clang++ but your compiler may have a version number postfix

CXX14FLAGS+=-flto -Wno-unused-local-typedefs -Wno-ignored-attributes -Wno-deprecated-declarations

```

I’ve already got Rcpp configured, works OK.

> install.packages(“rstan”, type = “source”, lib = TARGETLIB)

Runs for a while, fails:

```
  % Total % Received % Xferd Average Speed Time Time Time Current
                                 Dload Upload Total Spent Left Speed
100 814k 100 814k 0 0 28.5M 0 --:--:-- --:--:-- --:--:-- 39.7M
* installing *source* package ‘rstan’ ...
** package ‘rstan’ successfully unpacked and MD5 sums checked
** libs
g++ -std=c++1y -I/panfs/pfs.local/software/install/MRO/3.5.1/ropen/3.5.1/lib64/R/include -I"../inst/include" -I"`"/panfs/pfs.local/software/install/MRO/3.5.1/ropen/3.5.1/lib64/R/bin/Rscript" --vanilla -e "cat(system.file('include', 'src', package = 'StanHeaders'))"`" -DBOOST_DISABLE_ASSERTS -DBOOST_PHOENIX_NO_VARIADIC_EXPRESSION -I"/panfs/pfs.local/work/crmda/tools/mro/3.5/site-library/Rcpp/include" -I"/panfs/pfs.local/work/crmda/tools/mro/3.5/site-library/RcppEigen/include" -I"/panfs/pfs.local/work/crmda/tools/mro/3.5/site-library/BH/include" -I"/panfs/pfs.local/work/crmda/tools/mro/3.5/site-library/StanHeaders/include" -DU_STATIC_IMPLEMENTATION -c chains.cpp -o chains.o
g++ -std=c++1y -I/panfs/pfs.local/software/install/MRO/3.5.1/ropen/3.5.1/lib64/R/include -I"../inst/include" -I"`"/panfs/pfs.local/software/install/MRO/3.5.1/ropen/3.5.1/lib64/R/bin/Rscript" --vanilla -e "cat(system.file('include', 'src', package = 'StanHeaders'))"`" -DBOOST_DISABLE_ASSERTS -DBOOST_PHOENIX_NO_VARIADIC_EXPRESSION -I"/panfs/pfs.local/work/crmda/tools/mro/3.5/site-library/Rcpp/include" -I"/panfs/pfs.local/work/crmda/tools/mro/3.5/site-library/RcppEigen/include" -I"/panfs/pfs.local/work/crmda/tools/mro/3.5/site-library/BH/include" -I"/panfs/pfs.local/work/crmda/tools/mro/3.5/site-library/StanHeaders/include" -DU_STATIC_IMPLEMENTATION -c init.cpp -o init.o
g++ -std=c++1y -I/panfs/pfs.local/software/install/MRO/3.5.1/ropen/3.5.1/lib64/R/include -I"../inst/include" -I"`"/panfs/pfs.local/software/install/MRO/3.5.1/ropen/3.5.1/lib64/R/bin/Rscript" --vanilla -e "cat(system.file('include', 'src', package = 'StanHeaders'))"`" -DBOOST_DISABLE_ASSERTS -DBOOST_PHOENIX_NO_VARIADIC_EXPRESSION -I"/panfs/pfs.local/work/crmda/tools/mro/3.5/site-library/Rcpp/include" -I"/panfs/pfs.local/work/crmda/tools/mro/3.5/site-library/RcppEigen/include" -I"/panfs/pfs.local/work/crmda/tools/mro/3.5/site-library/BH/include" -I"/panfs/pfs.local/work/crmda/tools/mro/3.5/site-library/StanHeaders/include" -DU_STATIC_IMPLEMENTATION -c lang __ast_def.cpp -o lang__ ast_def.o
g++ -std=c++1y -I/panfs/pfs.local/software/install/MRO/3.5.1/ropen/3.5.1/lib64/R/include -I"../inst/include" -I"`"/panfs/pfs.local/software/install/MRO/3.5.1/ropen/3.5.1/lib64/R/bin/Rscript" --vanilla -e "cat(system.file('include', 'src', package = 'StanHeaders'))"`" -DBOOST_DISABLE_ASSERTS -DBOOST_PHOENIX_NO_VARIADIC_EXPRESSION -I"/panfs/pfs.local/work/crmda/tools/mro/3.5/site-library/Rcpp/include" -I"/panfs/pfs.local/work/crmda/tools/mro/3.5/site-library/RcppEigen/include" -I"/panfs/pfs.local/work/crmda/tools/mro/3.5/site-library/BH/include" -I"/panfs/pfs.local/work/crmda/tools/mro/3.5/site-library/StanHeaders/include" -DU_STATIC_IMPLEMENTATION -c lang __grammars__ bare_type_grammar_inst.cpp -o lang __grammars__ bare_type_grammar_inst.o
g++ -std=c++1y -I/panfs/pfs.local/software/install/MRO/3.5.1/ropen/3.5.1/lib64/R/include -I"../inst/include" -I"`"/panfs/pfs.local/software/install/MRO/3.5.1/ropen/3.5.1/lib64/R/bin/Rscript" --vanilla -e "cat(system.file('include', 'src', package = 'StanHeaders'))"`" -DBOOST_DISABLE_ASSERTS -DBOOST_PHOENIX_NO_VARIADIC_EXPRESSION -I"/panfs/pfs.local/work/crmda/tools/mro/3.5/site-library/Rcpp/include" -I"/panfs/pfs.local/work/crmda/tools/mro/3.5/site-library/RcppEigen/include" -I"/panfs/pfs.local/work/crmda/tools/mro/3.5/site-library/BH/include" -I"/panfs/pfs.local/work/crmda/tools/mro/3.5/site-library/StanHeaders/include" -DU_STATIC_IMPLEMENTATION -c lang __grammars__ expression07_grammar_inst.cpp -o lang __grammars__ expression07_grammar_inst.o
In file included from /panfs/pfs.local/work/crmda/tools/mro/3.5/site-library/RcppEigen/include/Eigen/Core:388:0,
                 from /panfs/pfs.local/work/crmda/tools/mro/3.5/site-library/RcppEigen/include/Eigen/Dense:1,
                 from /panfs/pfs.local/work/crmda/tools/mro/3.5/site-library/StanHeaders/include/stan/math/prim/mat/fun/Eigen.hpp:4,
                 from /panfs/pfs.local/work/crmda/tools/mro/3.5/site-library/StanHeaders/include/stan/math/prim/mat/fun/mean.hpp:5,
                 from chains.cpp:19:
/panfs/pfs.local/work/crmda/tools/mro/3.5/site-library/RcppEigen/include/Eigen/src/Core/arch/SSE/PacketMath.h:60:39: warning: ignoring attributes on template argument ‘ __m128 {aka__ vector(4) float}’ [-Wignored-attributes]
 template<> struct is_arithmetic<__m128> { enum { value = true }; };
                                       ^
/panfs/pfs.local/work/crmda/tools/mro/3.5/site-library/RcppEigen/include/Eigen/src/Core/arch/SSE/PacketMath.h:61:40: warning: ignoring attributes on template argument ‘ __m128i {aka__ vector(2) long long int}’ [-Wignored-attributes]
 template<> struct is_arithmetic<__m128i> { enum { value = true }; };
                                        ^
/panfs/pfs.local/work/crmda/tools/mro/3.5/site-library/RcppEigen/include/Eigen/src/Core/arch/SSE/PacketMath.h:62:40: warning: ignoring attributes on template argument ‘ __m128d {aka__ vector(2) double}’ [-Wignored-attributes]
 template<> struct is_arithmetic<__m128d> { enum { value = true }; };
                                        ^
/panfs/pfs.local/work/crmda/tools/mro/3.5/site-library/RcppEigen/include/Eigen/src/Core/arch/SSE/PacketMath.h:161:43: warning: ignoring attributes on template argument ‘Eigen::internal::Packet4f {aka __vector(4) float}’ [-Wignored-attributes]
 template<> struct unpacket_traits<Packet4f> { typedef float type; enum {size=4, alignment=Aligned16}; typedef Packet4f half; };
                                           ^
In file included from /panfs/pfs.local/work/crmda/tools/mro/3.5/site-library/RcppEigen/include/Eigen/Core:388:0,
                 from /panfs/pfs.local/work/crmda/tools/mro/3.5/site-library/RcppEigen/include/Eigen/Dense:1,
                 from /panfs/pfs.local/work/crmda/tools/mro/3.5/site-library/StanHeaders/include/stan/math/prim/mat/fun/Eigen.hpp:4,
                 from /panfs/pfs.local/work/crmda/tools/mro/3.5/site-library/StanHeaders/include/stan/math/prim/mat/fun/mean.hpp:5,
                 from chains.cpp:19:
/panfs/pfs.local/work/crmda/tools/mro/3.5/site-library/RcppEigen/include/Eigen/src/Core/arch/SSE/PacketMath.h:162:43: warning: ignoring attributes on template argument ‘Eigen::internal::Packet2d {aka __vector(2) double}’ [-Wignored-attributes]
 template<> struct unpacket_traits<Packet2d> { typedef double type; enum {size=2, alignment=Aligned16}; typedef Packet2d half; };
                                           ^
/panfs/pfs.local/work/crmda/tools/mro/3.5/site-library/RcppEigen/include/Eigen/src/Core/arch/SSE/PacketMath.h:163:43: warning: ignoring attributes on template argument ‘Eigen::internal::Packet4i {aka __vector(2) long long int}’ [-Wignored-attributes]
 template<> struct unpacket_traits<Packet4i> { typedef int type; enum {size=4, alignment=Aligned16}; typedef Packet4i half; };
                                           ^
/panfs/pfs.local/work/crmda/tools/mro/3.5/site-library/RcppEigen/include/Eigen/src/Core/arch/SSE/PacketMath.h:712:35: warning: ignoring attributes on template argument ‘Eigen::internal::Packet4f {aka __vector(4) float}’ [-Wignored-attributes]
 struct palign_impl<Offset,Packet4f>
                                   ^
/panfs/pfs.local/work/crmda/tools/mro/3.5/site-library/RcppEigen/include/Eigen/src/Core/arch/SSE/PacketMath.h:735:35: warning: ignoring attributes on template argument ‘Eigen::internal::Packet4i {aka __vector(2) long long int}’ [-Wignored-attributes]
 struct palign_impl<Offset,Packet4i>
                                   ^
/panfs/pfs.local/work/crmda/tools/mro/3.5/site-library/RcppEigen/include/Eigen/src/Core/arch/SSE/PacketMath.h:758:35: warning: ignoring attributes on template argument ‘Eigen::internal::Packet2d {aka __vector(2) double}’ [-Wignored-attributes]
 struct palign_impl<Offset,Packet2d>
                                   ^
/panfs/pfs.local/work/crmda/tools/mro/3.5/site-library/RcppEigen/include/Eigen/src/Core/arch/SSE/PacketMath.h:772:34: warning: ignoring attributes on template argument ‘Eigen::internal::Packet4f {aka __vector(4) float}’ [-Wignored-attributes]
 ptranspose(PacketBlock<Packet4f,4>& kernel) {
                                  ^
/panfs/pfs.local/work/crmda/tools/mro/3.5/site-library/RcppEigen/include/Eigen/src/Core/arch/SSE/PacketMath.h:777:34: warning: ignoring attributes on template argument ‘Eigen::internal::Packet2d {aka __vector(2) double}’ [-Wignored-attributes]
 ptranspose(PacketBlock<Packet2d,2>& kernel) {
                                  ^
/panfs/pfs.local/work/crmda/tools/mro/3.5/site-library/RcppEigen/include/Eigen/src/Core/arch/SSE/PacketMath.h:784:34: warning: ignoring attributes on template argument ‘Eigen::internal::Packet4i {aka __vector(2) long long int}’ [-Wignored-attributes]
 ptranspose(PacketBlock<Packet4i,4>& kernel) {
                                  ^
In file included from /panfs/pfs.local/work/crmda/tools/mro/3.5/site-library/RcppEigen/include/Eigen/Core:371:0,
                 from /panfs/pfs.local/work/crmda/tools/mro/3.5/site-library/RcppEigen/include/Eigen/Dense:1,
                 from /panfs/pfs.local/work/crmda/tools/mro/3.5/site-library/StanHeaders/include/stan/math/prim/mat/fun/Eigen.hpp:4,
                 from /panfs/pfs.local/work/crmda/tools/mro/3.5/site-library/StanHeaders/include/stan/math/prim/mat/fun/mean.hpp:5,
                 from chains.cpp:19:
/panfs/pfs.local/work/crmda/tools/mro/3.5/site-library/RcppEigen/include/Eigen/src/Core/arch/Default/ConjHelper.h:15:70: warning: ignoring attributes on template argument ‘Eigen::internal::Packet4f {aka __vector(4) float}’ [-Wignored-attributes]
   template<> struct conj_helper<PACKET_REAL, PACKET_CPLX, false,false> { \
                                                                      ^
/panfs/pfs.local/work/crmda/tools/mro/3.5/site-library/RcppEigen/include/Eigen/src/Core/arch/SSE/Complex.h:232:1: note: in expansion of macro ‘EIGEN_MAKE_CONJ_HELPER_CPLX_REAL’
 EIGEN_MAKE_CONJ_HELPER_CPLX_REAL(Packet2cf,Packet4f)
 ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/panfs/pfs.local/work/crmda/tools/mro/3.5/site-library/RcppEigen/include/Eigen/src/Core/arch/Default/ConjHelper.h:22:70: warning: ignoring attributes on template argument ‘Eigen::internal::Packet4f {aka __vector(4) float}’ [-Wignored-attributes]
   template<> struct conj_helper<PACKET_CPLX, PACKET_REAL, false,false> { \
                                                                      ^
/panfs/pfs.local/work/crmda/tools/mro/3.5/site-library/RcppEigen/include/Eigen/src/Core/arch/SSE/Complex.h:232:1: note: in expansion of macro ‘EIGEN_MAKE_CONJ_HELPER_CPLX_REAL’
 EIGEN_MAKE_CONJ_HELPER_CPLX_REAL(Packet2cf,Packet4f)
 ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/panfs/pfs.local/work/crmda/tools/mro/3.5/site-library/RcppEigen/include/Eigen/src/Core/arch/Default/ConjHelper.h:15:70: warning: ignoring attributes on template argument ‘Eigen::internal::Packet2d {aka __vector(2) double}’ [-Wignored-attributes]
   template<> struct conj_helper<PACKET_REAL, PACKET_CPLX, false,false> { \
                                                                      ^
/panfs/pfs.local/work/crmda/tools/mro/3.5/site-library/RcppEigen/include/Eigen/src/Core/arch/SSE/Complex.h:417:1: note: in expansion of macro ‘EIGEN_MAKE_CONJ_HELPER_CPLX_REAL’
 EIGEN_MAKE_CONJ_HELPER_CPLX_REAL(Packet1cd,Packet2d)
 ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/panfs/pfs.local/work/crmda/tools/mro/3.5/site-library/RcppEigen/include/Eigen/src/Core/arch/Default/ConjHelper.h:22:70: warning: ignoring attributes on template argument ‘Eigen::internal::Packet2d {aka __vector(2) double}’ [-Wignored-attributes]
   template<> struct conj_helper<PACKET_CPLX, PACKET_REAL, false,false> { \
                                                                      ^
/panfs/pfs.local/work/crmda/tools/mro/3.5/site-library/RcppEigen/include/Eigen/src/Core/arch/SSE/Complex.h:417:1: note: in expansion of macro ‘EIGEN_MAKE_CONJ_HELPER_CPLX_REAL’
 EIGEN_MAKE_CONJ_HELPER_CPLX_REAL(Packet1cd,Packet2d)
 ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from /panfs/pfs.local/work/crmda/tools/mro/3.5/site-library/RcppEigen/include/Eigen/Core:364:0,
                 from /panfs/pfs.local/work/crmda/tools/mro/3.5/site-library/RcppEigen/include/Eigen/Dense:1,
                 from /panfs/pfs.local/work/crmda/tools/mro/3.5/site-library/StanHeaders/include/stan/math/prim/mat/fun/Eigen.hpp:4,
                 from /panfs/pfs.local/work/crmda/tools/mro/3.5/site-library/StanHeaders/include/stan/math/prim/mat/fun/mean.hpp:5,
                 from chains.cpp:19:
/panfs/pfs.local/work/crmda/tools/mro/3.5/site-library/RcppEigen/include/Eigen/src/Core/util/XprHelper.h: In instantiation of ‘struct Eigen::internal::find_best_packet<float, 4>’:
/panfs/pfs.local/work/crmda/tools/mro/3.5/site-library/RcppEigen/include/Eigen/src/Core/Matrix.h:22:57: required from ‘struct Eigen::internal::traits<Eigen::Matrix<float, 4, 1> >’

[snip]

g++ -I/panfs/pfs.local/software/install/MRO/3.5.1/ropen/3.5.1/lib64/R/include -DNDEBUG -I"../inst/include" -I"`"/panfs/pfs.local/software/install/MRO/3.5.1/ropen/3.5.1/lib64/R/bin/Rscript" --vanilla -e "cat(system.file('include', 'src', package = 'StanHeaders'))"`" -DBOOST_DISABLE_ASSERTS -DBOOST_PHOENIX_NO_VARIADIC_EXPRESSION -I"/panfs/pfs.local/work/crmda/tools/mro/3.5/site-library/Rcpp/include" -I"/panfs/pfs.local/work/crmda/tools/mro/3.5/site-library/RcppEigen/include" -I"/panfs/pfs.local/work/crmda/tools/mro/3.5/site-library/BH/include" -I"/panfs/pfs.local/work/crmda/tools/mro/3.5/site-library/StanHeaders/include" -DU_STATIC_IMPLEMENTATION -O3 -mtune=native -march=native -Wno-unused-variable -Wno-unused-function -fPIC -flto -Wno-unused-local-typedefs -Wno-ignored-attributes -Wno-deprecated-declarations -c sparse_extractors.cpp -o sparse_extractors.o
g++ -I/panfs/pfs.local/software/install/MRO/3.5.1/ropen/3.5.1/lib64/R/include -DNDEBUG -I"../inst/include" -I"`"/panfs/pfs.local/software/install/MRO/3.5.1/ropen/3.5.1/lib64/R/bin/Rscript" --vanilla -e "cat(system.file('include', 'src', package = 'StanHeaders'))"`" -DBOOST_DISABLE_ASSERTS -DBOOST_PHOENIX_NO_VARIADIC_EXPRESSION -I"/panfs/pfs.local/work/crmda/tools/mro/3.5/site-library/Rcpp/include" -I"/panfs/pfs.local/work/crmda/tools/mro/3.5/site-library/RcppEigen/include" -I"/panfs/pfs.local/work/crmda/tools/mro/3.5/site-library/BH/include" -I"/panfs/pfs.local/work/crmda/tools/mro/3.5/site-library/StanHeaders/include" -DU_STATIC_IMPLEMENTATION -O3 -mtune=native -march=native -Wno-unused-variable -Wno-unused-function -fPIC -flto -Wno-unused-local-typedefs -Wno-ignored-attributes -Wno-deprecated-declarations -c stanc.cpp -o stanc.o
g++ -shared -L/panfs/pfs.local/software/install/MRO/3.5.1/ropen/3.5.1/lib64/R/lib -o rstan.so chains.o init.o lang __ast_def.o lang__ grammars __bare_type_grammar_inst.o lang__ grammars __expression07_grammar_inst.o lang__ grammars __expression_grammar_inst.o lang__ grammars __functions_grammar_inst.o lang__ grammars __indexes_grammar_inst.o lang__ grammars __program_grammar_inst.o lang__ grammars __semantic_actions.o lang__ grammars __statement_2_grammar_inst.o lang__ grammars __statement_grammar_inst.o lang__ grammars __term_grammar_inst.o lang__ grammars __var_deccls_grammar_inst.o lang__ grammars__whitespace_grammar_inst.o misc.o pointer-tools.o sparse_extractors.o stanc.o -L/panfs/pfs.local/software/install/MRO/3.5.1/ropen/3.5.1/lib64/R/lib -lR
lto1: internal compiler error: in add_symbol_to_partition_1, at lto/lto-partition.c:202
0x5fe7fb add_symbol_to_partition_1
	../../gcc-6.3.0/gcc/lto/lto-partition.c:202
0x5fe5fd add_references_to_partition
	../../gcc-6.3.0/gcc/lto/lto-partition.c:92
0x5fe7a4 add_symbol_to_partition_1
	../../gcc-6.3.0/gcc/lto/lto-partition.c:175
0x5fe5fd add_references_to_partition
	../../gcc-6.3.0/gcc/lto/lto-partition.c:92
0x5fe7a4 add_symbol_to_partition_1
	../../gcc-6.3.0/gcc/lto/lto-partition.c:175
0x5fe8b3 add_symbol_to_partition_1
	../../gcc-6.3.0/gcc/lto/lto-partition.c:160
0x5fe8b3 add_symbol_to_partition_1
	../../gcc-6.3.0/gcc/lto/lto-partition.c:160
0x5fe8b3 add_symbol_to_partition_1
	../../gcc-6.3.0/gcc/lto/lto-partition.c:160
0x5fe8b3 add_symbol_to_partition_1
	../../gcc-6.3.0/gcc/lto/lto-partition.c:160
0x5fe8b3 add_symbol_to_partition_1
	../../gcc-6.3.0/gcc/lto/lto-partition.c:160
0x5ff1e3 lto_balanced_map(int)
	../../gcc-6.3.0/gcc/lto/lto-partition.c:546
0x5f86d8 do_whole_program_analysis
	../../gcc-6.3.0/gcc/lto/lto.c:3128
0x5f86d8 lto_main()
	../../gcc-6.3.0/gcc/lto/lto.c:3322
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <http://gcc.gnu.org/bugs.html> for instructions.
lto-wrapper: fatal error: g++ returned 1 exit status
compilation terminated.
collect2: fatal error: lto-wrapper returned 1 exit status
compilation terminated.
make: *** [rstan.so] Error 1
ERROR: compilation failed for package ‘rstan’
* removing ‘/panfs/pfs.local/work/crmda/tools/mro/3.5/site-library/rstan’

The downloaded source packages are in
	‘/library/tmp/Rtmp0f1wU2/downloaded_packages’
Warning message:
In install.packages("rstan", type = "source", lib = TARGETLIB) :
  installation of package ‘rstan’ had non-zero exit status
>

```

---

<div class="post-metadata">

**Author:** ![bgoodri](https://yyz2.discourse-cdn.com/flex030/user_avatar/discourse.mc-stan.org/bgoodri/32/4451_2.png) [@bgoodri](https://discourse.mc-stan.org/u/bgoodri)\
**Post date:** [November 7, 2018, 9:42pm UTC](https://discourse.mc-stan.org/t/linux-compile-with-gcc-6-3-possible/6401/2 "2018-11-07T21:42:08Z")

</div>

> [@pauljohn32](#):
>
> lto1: internal compiler error: in add\_symbol\_to\_partition\_1, at lto/lto-partition.c:202

Try it without the `-flto` in `CXX14FLAGS` in ~/.R/Makevars

---

<div class="post-metadata">

**Author:** ![pauljohn32](https://avatars.discourse-cdn.com/v4/letter/p/a8b319/32.png) [@pauljohn32](https://discourse.mc-stan.org/u/pauljohn32)\
**Post date:** [November 7, 2018, 10:19pm UTC](https://discourse.mc-stan.org/t/linux-compile-with-gcc-6-3-possible/6401/3 "2018-11-07T22:19:56Z")

</div>

Success after that change. Thanks

---

<div class="post-metadata">

**Author:** ![bgoodri](https://yyz2.discourse-cdn.com/flex030/user_avatar/discourse.mc-stan.org/bgoodri/32/4451_2.png) [@bgoodri](https://discourse.mc-stan.org/u/bgoodri)\
**Post date:** [November 8, 2018, 1:09am UTC](https://discourse.mc-stan.org/t/linux-compile-with-gcc-6-3-possible/6401/4 "2018-11-08T01:09:35Z")

</div>

It appears as if the underlying compiler bug was fixed for 8.1 but has not been backported

[https://gcc.gnu.org/bugzilla/show\_bug.cgi?id=69866](https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69866)

And 6.5 was the last release on the `g++-6` series a few days ago. LTO is not critical, but there are some benchmarks supporting it

> [@thinLTO / standard benchmarks?](https://discourse.mc-stan.org/t/thinlto-standard-benchmarks/3673):
>
> I’ve been using @seantalts 's code in the “perf” branch of cmdstan to do some performance tests, and it seems like [thinLTO](https://clang.llvm.org/docs/ThinLTO.html) (a clang feature that tries to get most of the benefit of LTO without impacting compile-time) gives a noticable improvement. Since I’m new around here, my questions are: What’s the standard of evidence used to evaluate performance changes? Is there a standard set of benchmarks that should be run? Using @seantalts 's scripts, here’s the ratio of runtimes for a variety of …

You may be able to install **rstan** without the `-flto` flag but add it back to compile Stan programs at runtime.