diff --git a/Makefile.FreeBSD b/Makefile.FreeBSD
index 6431d40..81857ff 100644
--- a/Makefile.FreeBSD
+++ b/Makefile.FreeBSD
@@ -30,12 +30,12 @@ TYPECOMMAND = cat
 COMPATLIBS =
 MAKEFILE = Makefile.FreeBSD
 PLUGINS ?= StringsPlugin TrafficPlugin PCREPlugin TransparentPlugin
-OPENSSL_CHECK = $(shell echo "\#include <openssl/ssl.h>\\n int main(){return 0;}" | cc -x c -l crypto -l ssl -o testssl - 2>/dev/null && rm testssl && echo true||echo false)
+OPENSSL_CHECK = $(shell echo "\#include <openssl/ssl.h>\\n int main(){return 0;}" | cc -x c $(CFLAGS) $(LDFLAGS) -l crypto -l ssl -o testssl - 2>/dev/null && rm testssl && echo true||echo false)
 ifeq ($(OPENSSL_CHECK), true)
     LIBS += -l crypto -l ssl
     PLUGINS += SSLPlugin
 endif
-PAM_CHECK = $(shell echo "\#include <security/pam_appl.h>\\n int main(){return 0;}" | cc -x c -l pam -o testpam - 2>/dev/null && rm testpam && echo true||echo false)
+PAM_CHECK = $(shell echo "\#include <security/pam_appl.h>\\n int main(){return 0;}" | cc -x c $(CFLAGS) $(LDFLAGS) -l pam -o testpam - 2>/dev/null && rm testpam && echo true||echo false)
 ifeq ($(PAM_CHECK), true)
     PLUGINS += PamAuth
 endif
diff --git a/Makefile.Linux b/Makefile.Linux
index 3e873da..21bb004 100644
--- a/Makefile.Linux
+++ b/Makefile.Linux
@@ -36,12 +36,12 @@ MAKEFILE = Makefile.Linux
 LIBS ?= -ldl 
 #PLUGINS = SSLPlugin StringsPlugin TrafficPlugin PCREPlugin TransparentPlugin PamAuth
 PLUGINS ?= StringsPlugin TrafficPlugin PCREPlugin TransparentPlugin
-OPENSSL_CHECK = $(shell echo "#include <openssl/ssl.h>\\n int main(){return 0;}" | cc -x c -l crypto -l ssl -o testssl - 2>/dev/null && rm testssl && echo true||echo false)
+OPENSSL_CHECK = $(shell echo "#include <openssl/ssl.h>\\n int main(){return 0;}" | cc -x c $(CFLAGS) $(LDFLAGS) -l crypto -l ssl -o testssl - 2>/dev/null && rm testssl && echo true||echo false)
 ifeq ($(OPENSSL_CHECK), true)
     LIBS += -l crypto -l ssl
     PLUGINS += SSLPlugin
 endif
-PAM_CHECK = $(shell echo "#include <security/pam_appl.h>\\n int main(){return 0;}" | cc -x c -l pam -o testpam - 2>/dev/null && rm testpam && echo true||echo false)
+PAM_CHECK = $(shell echo "#include <security/pam_appl.h>\\n int main(){return 0;}" | cc -x c $(CFLAGS) $(LDFLAGS) -l pam -o testpam - 2>/dev/null && rm testpam && echo true||echo false)
 ifeq ($(PAM_CHECK), true)
     PLUGINS += PamAuth
 endif
diff --git a/Makefile.unix b/Makefile.unix
index 8642b24..f062e93 100644
--- a/Makefile.unix
+++ b/Makefile.unix
@@ -34,12 +34,12 @@ TYPECOMMAND = cat
 COMPATLIBS =
 MAKEFILE = Makefile.unix
 PLUGINS ?= StringsPlugin TrafficPlugin PCREPlugin TransparentPlugin
-OPENSSL_CHECK = $(shell echo "\#include <openssl/ssl.h>\\n int main(){return 0;}" | cc -x c -l crypto -l ssl -o testssl - 2>/dev/null && rm testssl && echo true||echo false)
+OPENSSL_CHECK = $(shell echo "\#include <openssl/ssl.h>\\n int main(){return 0;}" | cc -x c $(CFLAGS) $(LDFLAGS) -l crypto -l ssl -o testssl - 2>/dev/null && rm testssl && echo true||echo false)
 ifeq ($(OPENSSL_CHECK), true)
     LIBS += -l crypto -l ssl
     PLUGINS += SSLPlugin
 endif
-PAM_CHECK = $(shell echo "\#include <security/pam_appl.h>\\n int main(){return 0;}" | cc -x c -l pam -o testpam - 2>/dev/null && rm testpam && echo true||echo false)
+PAM_CHECK = $(shell echo "\#include <security/pam_appl.h>\\n int main(){return 0;}" | cc -x c $(CFLAGS) $(LDFLAGS) -l pam -o testpam - 2>/dev/null && rm testpam && echo true||echo false)
 ifeq ($(PAM_CHECK), true)
     PLUGINS += PamAuth
 endif