diff --git a/Makefile b/Makefile
index 0b86720..822fb52 100644
--- a/Makefile
+++ b/Makefile
@@ -107,7 +107,7 @@ $(B)/common/options.h: src/common/options.h.in
 $(B)/common/mtest.o: src/common/mtest.h
 $(math.OBJS): src/common/mtest.h
 
-$(B)/api/main: $(api.OBJS)
+$(B)/api/main.exe: $(api.OBJS)
 api/main.OBJS:=$(api.OBJS)
 $(api.OBJS):$(B)/common/options.h
 $(api.OBJS):CFLAGS+=-pedantic-errors -Werror -Wno-unused -D_XOPEN_SOURCE=700
diff --git a/config.mak.def b/config.mak.def
index aa3d1e5..49b49c1 100644
--- a/config.mak.def
+++ b/config.mak.def
@@ -1,5 +1,6 @@
 CFLAGS += -pipe -std=c99 -D_POSIX_C_SOURCE=200809L -Wall -Wno-unused-function -Wno-missing-braces -Wno-unused -Wno-overflow
 CFLAGS += -Wno-unknown-pragmas -fno-builtin -frounding-math
+CFLAGS += -Werror=implicit-function-declaration -Werror=implicit-int -Werror=pointer-sign -Werror=pointer-arith
 CFLAGS += -g
 LDFLAGS += -g
 LDLIBS += -lpthread -lm -lrt
diff --git a/src/functional/dlopen.mk b/src/functional/dlopen.mk
index a794074..7551578 100644
--- a/src/functional/dlopen.mk
+++ b/src/functional/dlopen.mk
@@ -1,3 +1,3 @@
-$(N).BINS:=$(B)/$(N)
+$(N).BINS:=$(B)/$(N).exe
 $(N).LDFLAGS:=-rdynamic
 $(B)/$(N).err: $(B)/$(D)/dlopen_dso.so
diff --git a/src/functional/tls_align.mk b/src/functional/tls_align.mk
index 654f7c9..a829b84 100644
--- a/src/functional/tls_align.mk
+++ b/src/functional/tls_align.mk
@@ -1,6 +1,6 @@
 $(N).LDLIBS := $(B)/$(D)/tls_align_dso.so
 $(N)-static.LDLIBS := $(B)/$(D)/tls_align_dso.o
 
-$(B)/$(N): $(B)/$(D)/tls_align_dso.so
-$(B)/$(N)-static: $(B)/$(D)/tls_align_dso.o
+$(B)/$(N).exe: $(B)/$(D)/tls_align_dso.so
+$(B)/$(N)-static.exe: $(B)/$(D)/tls_align_dso.o
 
diff --git a/src/functional/tls_align_dlopen.mk b/src/functional/tls_align_dlopen.mk
index b462446..bd5b740 100644
--- a/src/functional/tls_align_dlopen.mk
+++ b/src/functional/tls_align_dlopen.mk
@@ -1,2 +1,2 @@
-$(N).BINS=$(B)/$(N)
+$(N).BINS=$(B)/$(N).exe
 $(B)/$(N).err: $(B)/$(D)/tls_align_dso.so