diff --git a/scripts/mk_util.py b/scripts/mk_util.py
index 2ed420c20..a3eed360c 100644
--- a/scripts/mk_util.py
+++ b/scripts/mk_util.py
@@ -1782,7 +1782,7 @@ def mk_config():
                 FOCI2 = False
         if GIT_HASH:
             CPPFLAGS = '%s -DZ3GITHASH=%s' % (CPPFLAGS, GIT_HASH)
-        CXXFLAGS = '%s -c' % CXXFLAGS
+        CXXFLAGS = '%s -fvisibility=hidden -c' % CXXFLAGS
         HAS_OMP = test_openmp(CXX)
         if HAS_OMP:
             CXXFLAGS = '%s -fopenmp -mfpmath=sse' % CXXFLAGS
@@ -2104,7 +2104,7 @@ def mk_pat_db():
     c = get_component(PATTERN_COMPONENT)
     fin  = open(os.path.join(c.src_dir, 'database.smt2'), 'r')
     fout = open(os.path.join(c.src_dir, 'database.h'), 'w')
-    fout.write('char const * g_pattern_database =\n')
+    fout.write('static char const g_pattern_database[] =\n')
     for line in fin:
         fout.write('"%s\\n"\n' % line.strip('\n'))
     fout.write(';\n')
diff --git a/src/api/api_ast.cpp b/src/api/api_ast.cpp
index b9c6230b7..20ef9ba7f 100644
--- a/src/api/api_ast.cpp
+++ b/src/api/api_ast.cpp
@@ -300,7 +300,7 @@ extern "C" {
         Z3_CATCH_RETURN(-1);
     }
     
-    char const * Z3_API Z3_get_symbol_string(Z3_context c, Z3_symbol s) {
+    Z3_API char const * Z3_get_symbol_string(Z3_context c, Z3_symbol s) {
         Z3_TRY;
         LOG_Z3_get_symbol_string(c, s);
         RESET_ERROR_CODE();
@@ -823,7 +823,7 @@ extern "C" {
         Z3_CATCH_RETURN(0);
     }
 
-    char const * Z3_API Z3_ast_to_string(Z3_context c, Z3_ast a) {
+    Z3_API char const * Z3_ast_to_string(Z3_context c, Z3_ast a) {
         Z3_TRY;
         LOG_Z3_ast_to_string(c, a);
         RESET_ERROR_CODE();
@@ -866,11 +866,11 @@ extern "C" {
         Z3_CATCH_RETURN(0);
     }
 
-    char const * Z3_API Z3_sort_to_string(Z3_context c, Z3_sort s) {
+    Z3_API char const * Z3_sort_to_string(Z3_context c, Z3_sort s) {
         return Z3_ast_to_string(c, reinterpret_cast<Z3_ast>(s));
     }
 
-    char const * Z3_API Z3_func_decl_to_string(Z3_context c, Z3_func_decl f) {
+    Z3_API char const * Z3_func_decl_to_string(Z3_context c, Z3_func_decl f) {
         return Z3_ast_to_string(c, reinterpret_cast<Z3_ast>(f));
     }
 
diff --git a/src/api/api_context.cpp b/src/api/api_context.cpp
index 3408cdf3c..49fa10d94 100644
--- a/src/api/api_context.cpp
+++ b/src/api/api_context.cpp
@@ -548,12 +548,12 @@ extern "C" {
         }
     }
 
-    char const * Z3_API Z3_get_error_msg(Z3_error_code err) {
+    Z3_API char const * Z3_get_error_msg(Z3_error_code err) {
         LOG_Z3_get_error_msg(err);
         return _get_error_msg_ex(0, err);
     }
 
-    char const * Z3_API Z3_get_error_msg_ex(Z3_context c, Z3_error_code err) {
+    Z3_API char const * Z3_get_error_msg_ex(Z3_context c, Z3_error_code err) {
         LOG_Z3_get_error_msg_ex(c, err);
         return _get_error_msg_ex(c, err);
     }
@@ -577,7 +577,7 @@ extern "C" {
     
 };
 
-ast_manager & Z3_API Z3_get_manager(__in Z3_context c) {
+Z3_API ast_manager& Z3_get_manager(__in Z3_context c) {
     return mk_c(c)->m();
 }
 
diff --git a/src/api/api_model.cpp b/src/api/api_model.cpp
index f0c31d800..0ae1a9948 100644
--- a/src/api/api_model.cpp
+++ b/src/api/api_model.cpp
@@ -651,7 +651,7 @@ extern "C" {
         Z3_CATCH_RETURN(Z3_FALSE);
     }
 
-    char const * Z3_API Z3_model_to_string(Z3_context c, Z3_model m) {
+    Z3_API char const * Z3_model_to_string(Z3_context c, Z3_model m) {
         Z3_TRY;
         LOG_Z3_model_to_string(c, m);
         RESET_ERROR_CODE();
diff --git a/src/api/api_quant.cpp b/src/api/api_quant.cpp
index 4170852a9..727005186 100644
--- a/src/api/api_quant.cpp
+++ b/src/api/api_quant.cpp
@@ -507,7 +507,7 @@ extern "C" {
         return (Z3_ast)(p); 
     }    
 
-    char const * Z3_API Z3_pattern_to_string(Z3_context c, Z3_pattern p) {
+    Z3_API char const * Z3_pattern_to_string(Z3_context c, Z3_pattern p) {
         return Z3_ast_to_string(c, reinterpret_cast<Z3_ast>(p));
     }
     
diff --git a/src/api/api_solver_old.cpp b/src/api/api_solver_old.cpp
index b81fb2f2c..7e994a0e2 100644
--- a/src/api/api_solver_old.cpp
+++ b/src/api/api_solver_old.cpp
@@ -297,7 +297,7 @@ extern "C" {
         Z3_CATCH;
     }
 
-    char const * Z3_API Z3_context_to_string(Z3_context c) {
+    Z3_API char const * Z3_context_to_string(Z3_context c) {
         Z3_TRY;
         LOG_Z3_context_to_string(c);
         RESET_ERROR_CODE();
diff --git a/src/api/z3_macros.h b/src/api/z3_macros.h
index a4a0cb4be..7a0b6857c 100644
--- a/src/api/z3_macros.h
+++ b/src/api/z3_macros.h
@@ -35,7 +35,11 @@
 #endif
 
 #ifndef Z3_API
-#define Z3_API
+# ifdef __GNUC__
+#  define Z3_API __attribute__ ((visibility ("default")))
+# else
+#  define Z3_API
+# endif
 #endif 
 
 #ifndef DEFINE_TYPE
diff --git a/src/ast/ast_smt_pp.cpp b/src/ast/ast_smt_pp.cpp
index b28b640bb..805f3070f 100644
--- a/src/ast/ast_smt_pp.cpp
+++ b/src/ast/ast_smt_pp.cpp
@@ -34,9 +34,9 @@ Revision History:
 // ---------------------------------------
 // smt_renaming
 
-const static char* m_predef_names[] = {
+static const char m_predef_names[][8] = {
     "=", ">=", "<=", "+", "-", "*", ">", "<", "!=", "or", "and", "implies", "not", "iff", "xor",
-    "true", "false", "forall", "exists", "let", "flet", NULL
+    "true", "false", "forall", "exists", "let", "flet"
 };
 
 symbol smt_renaming::fix_symbol(symbol s, int k) {
@@ -120,8 +120,8 @@ bool smt_renaming::all_is_legal(char const* s) {
 }
 
 smt_renaming::smt_renaming() {
-    for (const char **p = m_predef_names; *p; ++p) {
-        symbol s(*p);
+    for (unsigned i = 0; i < ARRAYSIZE(m_predef_names); ++i) {
+        symbol s(m_predef_names[i]);
         m_translate.insert(s, s);
         m_rev_translate.insert(s, s);
     }
diff --git a/src/ast/rewriter/poly_rewriter.h b/src/ast/rewriter/poly_rewriter.h
index 9bdaf4959..6268c761d 100644
--- a/src/ast/rewriter/poly_rewriter.h
+++ b/src/ast/rewriter/poly_rewriter.h
@@ -26,8 +26,6 @@ Notes:
 
 template<typename Config>
 class poly_rewriter : public Config {
-public:
-    static char const * g_ste_blowup_msg;
 protected:
     typedef typename Config::numeral numeral; 
     sort *   m_curr_sort;
diff --git a/src/ast/rewriter/poly_rewriter_def.h b/src/ast/rewriter/poly_rewriter_def.h
index 036221f96..0a00a7199 100644
--- a/src/ast/rewriter/poly_rewriter_def.h
+++ b/src/ast/rewriter/poly_rewriter_def.h
@@ -22,9 +22,6 @@ Notes:
 #include"ast_ll_pp.h"
 #include"ast_smt2_pp.h"
 
-template<typename Config>
-char const * poly_rewriter<Config>::g_ste_blowup_msg = "sum of monomials blowup";
-
 
 template<typename Config>
 void poly_rewriter<Config>::updt_params(params_ref const & _p) {
@@ -356,7 +353,7 @@ br_status poly_rewriter<Config>::mk_nflat_mul_core(unsigned num_args, expr * con
         TRACE("som", for (unsigned i = 0; i < it.size(); i++) tout << it[i] << " ";
               tout << "\n";);
         if (sum.size() > m_som_blowup)
-            throw rewriter_exception(g_ste_blowup_msg);
+            throw rewriter_exception("sum of monomials blowup");
         m_args.reset();
         for (unsigned i = 0; i < num_args; i++) {
             expr * const * v = sums[i];
diff --git a/src/cmd_context/cmd_context.cpp b/src/cmd_context/cmd_context.cpp
index f5937955d..0c60d876b 100644
--- a/src/cmd_context/cmd_context.cpp
+++ b/src/cmd_context/cmd_context.cpp
@@ -1185,6 +1185,7 @@ void cmd_context::reset(bool finalize) {
     restore_assertions(0);
     if (m_solver)
         m_solver = 0;
+    m_scopes.reset();
     m_pp_env = 0;
     m_dt_eh  = 0;
     if (m_manager) {
diff --git a/src/smt/database.h b/src/smt/database.h
index 1975fe3c3..69843f434 100644
--- a/src/smt/database.h
+++ b/src/smt/database.h
@@ -1,4 +1,4 @@
-static char const * g_pattern_database =
+static char const g_pattern_database[] =
 "(benchmark patterns \n"
 " :status unknown \n"
 " :logic ALL \n"
diff --git a/src/util/memory_manager.cpp b/src/util/memory_manager.cpp
index 45088d5d4..5f56ded98 100644
--- a/src/util/memory_manager.cpp
+++ b/src/util/memory_manager.cpp
@@ -60,7 +60,7 @@ static void throw_out_of_memory() {
 }
 
 #ifdef PROFILE_MEMORY
-unsigned g_synch_counter = 0;
+static unsigned g_synch_counter = 0;
 class mem_usage_report {
 public:
     ~mem_usage_report() { 
diff --git a/src/util/util.cpp b/src/util/util.cpp
index eb9acb385..c4b729adb 100644
--- a/src/util/util.cpp
+++ b/src/util/util.cpp
@@ -19,7 +19,7 @@ Revision History:
 
 #include"util.h"
 
-unsigned g_verbosity_level = 0;
+static unsigned g_verbosity_level = 0;
 
 void set_verbosity_level(unsigned lvl) {
     g_verbosity_level = lvl;
@@ -40,7 +40,7 @@ std::ostream& verbose_stream() {
 }
 
 
-void (*g_fatal_error_handler)(int) = 0;
+static void (*g_fatal_error_handler)(int) = 0;
 
 void fatal_error(int error_code) {
     if (g_fatal_error_handler) {