Fresh download & first compilation of the latest ETK release. Compilation fails during LoopControl because a dynamic variable is used to set a const constexpr parameter “lc_random_range”. Here’s the error message:

`COMPILING Carpet/LoopControl/src/loopcontrol.cc /gpfs/scratch/bjk0015/codes/Cactus_ET_2021_05/arrangements/Carpet/LoopControl/src/loopcontrol.cc(70): error: function call must have a constant value in a constant expression lc_random.max() - lc_random.min() + 1; ^

/gpfs/scratch/bjk0015/codes/Cactus_ET_2021_05/arrangements/Carpet/LoopControl/src/loopcontrol.cc(70): error: function call must have a constant value in a constant expression lc_random.max() - lc_random.min() + 1;`

… though it’s useful to see the full assignment, which begins the line before (line 69):

minstd_rand::result_type const constexpr lc_random_range = lc_random.max() - lc_random.min() + 1;

Fix: take out the “const” and “constexpr” descriptors from the lc_random_range declaration. git diff is attached.

Further notes:

The compilation is on the WVU machine Spruce Knob, using the Intel 17.0.1 compiler. I’m using the following configuration options:

CC=icc

CFLAGS=-Ofast -qopenmp -xHost  -align -std=gnu99

CPP=cpp

CPPFLAGS=-DMPICH_IGNORE_CXX_SEEK

CPP_DEBUG_FLAGS=-DCARPET_DEBUG

CPP_OPENMP_FLAGS=-fopenmp

CROSS_COMPILE=yes

CXX=icpc

CXXFLAGS=-Ofast -qopenmp -xHost  -align -std=gnu++11

CXX_DEBUG_FLAGS=-O0

CXX_NO_OPTIMISE_FLAGS=-O0

CXX_OPENMP_FLAGS=-fopenmp

CXX_OPTIMISE_FLAGS=-Ofast

CXX_PROFILE_FLAGS=-pg

C_DEBUG_FLAGS=-O0

C_LINE_DIRECTIVES=yes

C_NO_OPTIMISE_FLAGS=-O0

C_OPENMP_FLAGS=-fopenmp

C_OPTIMISE_FLAGS=-Ofast

C_PROFILE_FLAGS=-pg

attachment:

git_diff_loopcontrol_dot_cc.txt

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Ticket URL: https://bitbucket.org/einsteintoolkit/tickets/issues/2548/compilation-failure-const-assignment-in