c89 compatibility

.travis.yml

@@ -22,7 +22,7 @@ matrix:
         - pip install mkdocs python-markdown-math --user
         - PATH=$PATH:~/.local/bin mkdocs build
         - mkdir build && pushd build
-        - cmake -DCMAKE_INSTALL_PREFIX=~/.local -DNLOPT_MATLAB=OFF -DNLOPT_FORTRAN=ON -DCMAKE_C_FLAGS='-Wall -Wextra' -DCMAKE_CXX_FLAGS='-Wall -Wextra' ..
+        - cmake -DCMAKE_INSTALL_PREFIX=~/.local -DNLOPT_MATLAB=OFF -DNLOPT_FORTRAN=ON -DCMAKE_C_FLAGS='-std=c89 -pedantic -D_POSIX_C_SOURCE=200112L -Wall -Wextra -Werror' -DCMAKE_CXX_FLAGS='-Wall -Wextra' ..
         - make install -j2 && ctest -j2 --output-on-failure
         - rm -rf * ~/.local
         - cmake -DCMAKE_INSTALL_PREFIX=~/.local -DNLOPT_PYTHON=OFF -DNLOPT_OCTAVE=OFF -DNLOPT_GUILE=OFF -DNLOPT_MATLAB=OFF -DNLOPT_FORTRAN=ON -DCMAKE_TOOLCHAIN_FILE=$PWD/../cmake/toolchain-x86_64-w64-mingw32.cmake ..

appveyor.yml

@@ -9,6 +9,7 @@ branches:
     - master
 environment:
   matrix:
+    - CMAKE_PLATFORM: "Visual Studio 10 2010"
     - CMAKE_PLATFORM: "Visual Studio 14 2015"
     - CMAKE_PLATFORM: "Visual Studio 14 2015 Win64"
 install:

src/algs/ags/ags.cc

@@ -36,7 +36,7 @@ int ags_minimize(unsigned n, nlopt_func func, void *data, unsigned m, nlopt_cons
   {
     if (fc[i].m != 1)
       return NLOPT_INVALID_ARGS;
-    functions.push_back([fc, data, n, i](const double* x) {
+    functions.push_back([fc, n, i](const double* x) {
       double val = 0;
       nlopt_eval_constraint(&val, NULL, &fc[i], n, x);
       return val;

src/algs/ags/ags.h

@@ -10,19 +10,20 @@
 extern "C" {
 #endif
 
-//The algorithm supports 3 types of stop criterions: stop by execution time, stop by value and stop by exceeding limit of iterations.
+/* The algorithm supports 3 types of stop criterions: stop by execution time, stop by value and stop by exceeding limit of iterations. */
 
 int ags_minimize(unsigned n, nlopt_func func, void *data, unsigned m, nlopt_constraint *fc,
                  double *x, double *minf, const double *l, const double *u, nlopt_stopping *stop);
 
-extern double ags_eps; //method tolerance in Holder metric on 1d interval. Less value -- better search precision, less probability of early stop.
-extern double ags_r; //reliability parameter. Higher value of r -- slower convergence, higher chance to cache the global minima.
-extern double eps_res; // parameter which prevents method from paying too much attention to constraints. Greater values of this parameter speed up convergence,
-// but global minima can be lost.
-extern unsigned evolvent_density; // density of evolvent. By default density is 2^-12 on hybercube [0,1]^N,
-// which means that maximum search accuracyis 2^-12. If search hypercube is large the density can be increased accordingly to achieve better accuracy.
-extern int ags_refine_loc; //refine the final optimum using built-in local optimizer
-extern int ags_verbose; //print additional info
+extern double ags_eps; /* method tolerance in Holder metric on 1d interval. Less value -- better search precision, less probability of early stop. */
+extern double ags_r; /* reliability parameter. Higher value of r -- slower convergence, higher chance to cache the global minima. */
+extern double eps_res; /* parameter which prevents method from paying too much attention to constraints. Greater values of this parameter speed up convergence,
+                          but global minima can be lost. */
+extern unsigned evolvent_density; /* density of evolvent. By default density is 2^-12 on hybercube [0,1]^N,
+                                     which means that maximum search accuracyis 2^-12. If search hypercube is large the density
+                                     can be increased accordingly to achieve better accuracy. */
+extern int ags_refine_loc; /* refine the final optimum using built-in local optimizer */
+extern int ags_verbose; /* print additional info */
 
 #ifdef __cplusplus
 }

src/algs/bobyqa/bobyqa.c

@@ -157,7 +157,7 @@ static nlopt_result rescue_(int *n, int *npt, const double *xl, const double *xu
     /* Local variables */
     double f;
     int i__, j, k, ih, jp, ip, iq, np, iw;
-    double xp = 0.0, xq, den;
+    double xp = 0.0, xq = 0.0, den;
     int ihp = 0;
     double one;
     int ihq, jpn, kpt;

src/algs/cdirect/hybrid.c

@@ -78,7 +78,6 @@ static nlopt_result optimize_rect(double *r, params *p)
      double minf;
      nlopt_stopping *stop = p->stop;
      nlopt_result ret;
-     nlopt_opt opt;
 
      if (stop->maxeval > 0 &&
 	 *(stop->nevals_p) >= stop->maxeval) return NLOPT_MAXEVAL_REACHED;

src/algs/direct/DIRserial.c

@@ -14,24 +14,24 @@
 /* +-----------------------------------------------------------------------+ */
 /* | SUBROUTINE for sampling.                                              | */
 /* +-----------------------------------------------------------------------+ */
-/* Subroutine */ void direct_dirsamplef_(doublereal *c__, integer *arrayi, doublereal 
-	*delta, integer *sample, integer *new__, integer *length, 
-	FILE *logfile, doublereal *f, integer *free, integer *maxi, 
+/* Subroutine */ void direct_dirsamplef_(doublereal *c__, integer *arrayi, doublereal
+	*delta, integer *sample, integer *new__, integer *length,
+	FILE *logfile, doublereal *f, integer *free, integer *maxi,
 	integer *point, fp fcn, doublereal *x, doublereal *l, doublereal *
-	minf, integer *minpos, doublereal *u, integer *n, integer *maxfunc, 
+	minf, integer *minpos, doublereal *u, integer *n, integer *maxfunc,
 	const integer *maxdeep, integer *oops, doublereal *fmax, integer *
 	ifeasiblef, integer *iinfesiblef, void *fcn_data, int *force_stop)
 {
-    (void) logfile; (void) free; (void) maxfunc; (void) maxdeep; (void) oops;
-    (void) delta; (void) sample;
-
     /* System generated locals */
     integer length_dim1, length_offset, c_dim1, c_offset, i__1, i__2;
     doublereal d__1;
 
     /* Local variables */
     integer i__, j, helppoint, pos, kret;
 
+    (void) logfile; (void) free; (void) maxfunc; (void) maxdeep; (void) oops;
+    (void) delta; (void) sample;
+
 /* +-----------------------------------------------------------------------+ */
 /* | JG 07/16/01 fcn must be declared external.                            | */
 /* +-----------------------------------------------------------------------+ */
@@ -86,7 +86,7 @@
 	if (force_stop && *force_stop)  /* skip eval after forced stop */
 	     f[(pos << 1) + 1] = *fmax;
 	else
-	     direct_dirinfcn_(fcn, &x[1], &l[1], &u[1], n, &f[(pos << 1) + 1], 
+	     direct_dirinfcn_(fcn, &x[1], &l[1], &u[1], n, &f[(pos << 1) + 1],
 			      &kret, fcn_data);
 	if (force_stop && *force_stop)
 	     kret = -1; /* mark as invalid point */