tDefine M_PI if not already defined - cngf-pf - continuum model for granular flows with pore-pressure dynamics (renamed from 1d_fd_simple_shear)
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       ---
 (DIR) commit b5b2b53da978c70da923317e45e51d1414a7faa0
 (DIR) parent 3f3eab4837248c63a8d4b499551ec2d3c596a8b8
 (HTM) Author: Anders Damsgaard <anders@adamsgaard.dk>
       Date:   Thu, 12 Dec 2019 22:14:24 +0100
       
       Define M_PI if not already defined
       
       Diffstat:
         M max_depth_simple_shear.c            |       4 ++++
       
       1 file changed, 4 insertions(+), 0 deletions(-)
       ---
 (DIR) diff --git a/max_depth_simple_shear.c b/max_depth_simple_shear.c
       t@@ -20,6 +20,10 @@
        /* uncomment to print time spent per time step to stdout */
        /* #define BENCHMARK_PERFORMANCE */
        
       +#ifndef M_PI
       +#define M_PI 3.1415926535897932384626433832795028841971693993751058209749445923078164062
       +#endif
       +
        static void
        usage(void)
        {