diff --git a/Makefile.FreeBSD b/Makefile.FreeBSD
index ed75eee..a6ba7a8 100644
--- a/Makefile.FreeBSD
+++ b/Makefile.FreeBSD
@@ -52,14 +52,14 @@ ifeq ($(LIBSTATIC), true)
     STATIC_SUFFIX = -Wl,-Bdynamic
     ZLIB = -lz -lzstd
 endif
-WOLFSSL_CHECK ?= $(shell echo "\#include <wolfssl/options.h>\\n\#include <wolfssl/openssl/ssl.h>\\n int main(){return 0;}" | tr -d \\\\ | $(CC) -x c $(CFLAGS) -o testwssl.o - 2>/dev/null && $(CC) $(LDFLAGS) -otestwssl testwssl.o $(STATIC_PREFIX) -lwolfssl $(STATIC_SUFFIX) 2>/dev/null && rm testwssl testwssl.o && echo true||echo false)
+WOLFSSL_CHECK ?= $(shell printf "\#include <wolfssl/options.h>\\n\#include <wolfssl/openssl/ssl.h>\\n int main(){return 0;}" | tr -d \\\\ | $(CC) -x c $(CFLAGS) -o testwssl.o - 2>/dev/null && $(CC) $(LDFLAGS) -otestwssl testwssl.o $(STATIC_PREFIX) -lwolfssl $(STATIC_SUFFIX) 2>/dev/null && rm testwssl testwssl.o && echo true||echo false)
 ifeq ($(WOLFSSL_CHECK), true)
     LIBS += $(STATIC_PREFIX) -lwolfssl $(STATIC_SUFFIX)
     CFLAGS += -DWITH_SSL -DWITH_WOLFSSL
     SSL_OBJS = ssllib$(OBJSUFFICS) ssl$(OBJSUFFICS)
     ZLIB :=
 else
-OPENSSL_CHECK ?= $(shell echo "\#include <openssl/ssl.h>\\n int main(){return 0;}" | tr -d \\\\ | $(CC) -x c $(CFLAGS) -o testssl.o - 2>/dev/null && $(CC) $(LDFLAGS) -otestssl testssl.o $(STATIC_PREFIX) $(ZLIB) -lcrypto -lssl  $(STATIC_SUFFIX) 2>/dev/null && rm testssl testssl.o && echo true||echo false)
+OPENSSL_CHECK ?= $(shell printf "\#include <openssl/ssl.h>\\n int main(){return 0;}" | tr -d \\\\ | $(CC) -x c $(CFLAGS) -o testssl.o - 2>/dev/null && $(CC) $(LDFLAGS) -otestssl testssl.o $(STATIC_PREFIX) $(ZLIB) -lcrypto -lssl  $(STATIC_SUFFIX) 2>/dev/null && rm testssl testssl.o && echo true||echo false)
 ifeq ($(OPENSSL_CHECK), true)
     LIBS += $(STATIC_PREFIX) $(ZLIB) -l crypto -l ssl $(STATIC_SUFFIX)
     CFLAGS += -DWITH_SSL
@@ -68,13 +68,13 @@ else
     ZLIB :=
 endif
 endif
-PCRE_CHECK ?= $(shell echo "\#define PCRE2_CODE_UNIT_WIDTH 8\\n\#include <pcre2.h>\\n int main(){return 0;}" | tr -d \\\\ | $(CC) -x c $(CFLAGS) -o testpcre.o - 2>/dev/null && $(CC) -o testpcre testpcre.o $(LDFLAGS) -lpcre2-8 2>/dev/null && rm testpcre testpcre.o && echo true||echo false)
+PCRE_CHECK ?= $(shell printf "\#define PCRE2_CODE_UNIT_WIDTH 8\\n\#include <pcre2.h>\\n int main(){return 0;}" | tr -d \\\\ | $(CC) -x c $(CFLAGS) -o testpcre.o - 2>/dev/null && $(CC) -o testpcre testpcre.o $(LDFLAGS) -lpcre2-8 2>/dev/null && rm testpcre testpcre.o && echo true||echo false)
 ifeq ($(PCRE_CHECK), true)
     CFLAGS += -DWITH_PCRE
     PCRE_OBJS = pcre$(OBJSUFFICS)
     PCRE_LIBS = $(STATIC_PREFIX) -lpcre2-8 $(STATIC_SUFFIX)
 endif
-PAM_CHECK ?= $(shell echo "\#include <security/pam_appl.h>\\n int main(){return 0;}" | tr -d \\\\ | $(CC) -x c $(CFLAGS) -o testpam.o - 2>/dev/null && $(CC) $(LDFLAGS) -o testpam testpam.o -lpam 2>/dev/null && rm testpam testpam.o && echo true||echo false)
+PAM_CHECK ?= $(shell printf "\#include <security/pam_appl.h>\\n int main(){return 0;}" | tr -d \\\\ | $(CC) -x c $(CFLAGS) -o testpam.o - 2>/dev/null && $(CC) $(LDFLAGS) -o testpam testpam.o -lpam 2>/dev/null && rm testpam testpam.o && echo true||echo false)
 ifeq ($(PAM_CHECK), true)
     PLUGINS += PamAuth
 endif
diff --git a/Makefile.Linux b/Makefile.Linux
index ab6a8a7..e399f60 100644
--- a/Makefile.Linux
+++ b/Makefile.Linux
@@ -60,14 +60,14 @@ ifeq ($(LIBSTATIC), true)
     ZLIB = -lz -lzstd
 endif
 
-WOLFSSL_CHECK ?= $(shell echo "\#include <wolfssl/options.h>\\n\#include <wolfssl/openssl/ssl.h>\\n int main(){return 0;}" | tr -d \\\\ | $(CC) -x c $(CFLAGS) -o testwssl.o - 2>/dev/null && $(CC) $(LDFLAGS) -otestwssl testwssl.o $(STATIC_PREFIX) -lwolfssl $(STATIC_SUFFIX) 2>/dev/null && rm testwssl testwssl.o && echo true||echo false)
+WOLFSSL_CHECK ?= $(shell printf "\#include <wolfssl/options.h>\\n\#include <wolfssl/openssl/ssl.h>\\n int main(){return 0;}" | tr -d \\\\ | $(CC) -x c $(CFLAGS) -o testwssl.o - 2>/dev/null && $(CC) $(LDFLAGS) -otestwssl testwssl.o $(STATIC_PREFIX) -lwolfssl $(STATIC_SUFFIX) 2>/dev/null && rm testwssl testwssl.o && echo true||echo false)
 ifeq ($(WOLFSSL_CHECK), true)
     LIBS += $(STATIC_PREFIX) -lwolfssl $(STATIC_SUFFIX)
     CFLAGS += -DWITH_SSL -DWITH_WOLFSSL
     SSL_OBJS = ssllib$(OBJSUFFICS) ssl$(OBJSUFFICS)
     ZLIB :=
 else
-OPENSSL_CHECK ?= $(shell echo "\#include <openssl/ssl.h>\\n int main(){return 0;}" | tr -d \\\\ | $(CC) -x c $(CFLAGS) -o testssl.o - 2>/dev/null && $(CC) $(LDFLAGS) -otestssl testssl.o $(STATIC_PREFIX) $(ZLIB) -lcrypto -lssl  $(STATIC_SUFFIX) 2>/dev/null && rm testssl testssl.o && echo true||echo false)
+OPENSSL_CHECK ?= $(shell printf "\#include <openssl/ssl.h>\\n int main(){return 0;}" | tr -d \\\\ | $(CC) -x c $(CFLAGS) -o testssl.o - 2>/dev/null && $(CC) $(LDFLAGS) -otestssl testssl.o $(STATIC_PREFIX) $(ZLIB) -lcrypto -lssl  $(STATIC_SUFFIX) 2>/dev/null && rm testssl testssl.o && echo true||echo false)
 ifeq ($(OPENSSL_CHECK), true)
     LIBS += $(STATIC_PREFIX) $(ZLIB) -lcrypto -lssl $(STATIC_SUFFIX)
     CFLAGS += -DWITH_SSL
@@ -76,13 +76,13 @@ else
     ZLIB :=
 endif
 endif
-PCRE_CHECK ?= $(shell echo "\#define PCRE2_CODE_UNIT_WIDTH 8\\n\#include <pcre2.h>\\n int main(){return 0;}" | tr -d \\\\ | $(CC) -x c $(CFLAGS) -o testpcre.o - 2>/dev/null && $(CC) -o testpcre testpcre.o $(LDFLAGS) $(STATIC_PREFIX) -lpcre2-8 $(STATIC_SUFFIX) 2>/dev/null && rm testpcre testpcre.o && echo true||echo false)
+PCRE_CHECK ?= $(shell printf "\#define PCRE2_CODE_UNIT_WIDTH 8\\n\#include <pcre2.h>\\n int main(){return 0;}" | tr -d \\\\ | $(CC) -x c $(CFLAGS) -o testpcre.o - 2>/dev/null && $(CC) -o testpcre testpcre.o $(LDFLAGS) $(STATIC_PREFIX) -lpcre2-8 $(STATIC_SUFFIX) 2>/dev/null && rm testpcre testpcre.o && echo true||echo false)
 ifeq ($(PCRE_CHECK), true)
     CFLAGS += -DWITH_PCRE
     PCRE_OBJS = pcre$(OBJSUFFICS)
     PCRE_LIBS = $(STATIC_PREFIX) -lpcre2-8 $(STATIC_SUFFIX)
 endif
-PAM_CHECK ?= $(shell echo "\#include <security/pam_appl.h>\\n int main(){return 0;}" | tr -d \\\\ | $(CC) -x c $(CFLAGS) -o testpam.o - 2>/dev/null && $(CC) $(LDFLAGS) -o testpam testpam.o -lpam 2>/dev/null && rm testpam testpam.o && echo true||echo false)
+PAM_CHECK ?= $(shell printf "\#include <security/pam_appl.h>\\n int main(){return 0;}" | tr -d \\\\ | $(CC) -x c $(CFLAGS) -o testpam.o - 2>/dev/null && $(CC) $(LDFLAGS) -o testpam testpam.o -lpam 2>/dev/null && rm testpam testpam.o && echo true||echo false)
 ifeq ($(PAM_CHECK), true)
     PLUGINS += PamAuth
 endif
diff --git a/Makefile.Solaris b/Makefile.Solaris
index 2140a37..2def1c9 100644
--- a/Makefile.Solaris
+++ b/Makefile.Solaris
@@ -31,20 +31,20 @@ COMPATLIBS =
 MAKEFILE = Makefile.Solaris
 PLUGINS = StringsPlugin TrafficPlugin TransparentPlugin FilePlugin
 
-WOLFSSL_CHECK = $(shell echo "\#include <wolfssl/options.h>\\n\#include <wolfssl/openssl/ssl.h>\\n int main(){return 0;}" | tr -d \\\\ | $(CC) -x c $(CFLAGS) -o testwssl.o - 2>/dev/null && $(CC) $(LDFLAGS) -o testwssl testwssl.o -lwolfssl 2>/dev/null && rm testwssl testwssl.o && echo true||echo false)
+WOLFSSL_CHECK = $(shell printf "\#include <wolfssl/options.h>\\n\#include <wolfssl/openssl/ssl.h>\\n int main(){return 0;}" | tr -d \\\\ | $(CC) -x c $(CFLAGS) -o testwssl.o - 2>/dev/null && $(CC) $(LDFLAGS) -o testwssl testwssl.o -lwolfssl 2>/dev/null && rm testwssl testwssl.o && echo true||echo false)
 ifeq ($(WOLFSSL_CHECK), true)
     LIBS += -lwolfssl
     CFLAGS += -DWITH_SSL -DWITH_WOLFSSL
     SSL_OBJS = ssllib$(OBJSUFFICS) ssl$(OBJSUFFICS)
 else
-OPENSSL_CHECK = $(shell echo "\#include <openssl/ssl.h>\\n int main(){return 0;}" | tr -d \\\\ | $(CC) -x c $(CFLAGS) -o testssl.o - 2>/dev/null && $(CC) $(LDFLAGS) -o testssl testssl.o -lcrypto -lssl 2>/dev/null && rm testssl testssl.o && echo true||echo false)
+OPENSSL_CHECK = $(shell printf "\#include <openssl/ssl.h>\\n int main(){return 0;}" | tr -d \\\\ | $(CC) -x c $(CFLAGS) -o testssl.o - 2>/dev/null && $(CC) $(LDFLAGS) -o testssl testssl.o -lcrypto -lssl 2>/dev/null && rm testssl testssl.o && echo true||echo false)
 ifeq ($(OPENSSL_CHECK), true)
     LIBS += -l crypto -l ssl
     CFLAGS += -DWITH_SSL
     SSL_OBJS = ssllib$(OBJSUFFICS) ssl$(OBJSUFFICS)
 endif
 endif
-PCRE_CHECK = $(shell echo "\#define PCRE2_CODE_UNIT_WIDTH 8\\n\#include <pcre2.h>\\n int main(){return 0;}" | tr -d \\\\ | $(CC) -x c $(CFLAGS) -o testpcre.o - 2>/dev/null && $(CC) -o testpcre testpcre.o $(LDFLAGS) -Wl,-Bstatic -lpcre2-8 -Wl,-Bdynamic 2>/dev/null && rm testpcre testpcre.o && echo true||echo false)
+PCRE_CHECK = $(shell printf "\#define PCRE2_CODE_UNIT_WIDTH 8\\n\#include <pcre2.h>\\n int main(){return 0;}" | tr -d \\\\ | $(CC) -x c $(CFLAGS) -o testpcre.o - 2>/dev/null && $(CC) -o testpcre testpcre.o $(LDFLAGS) -Wl,-Bstatic -lpcre2-8 -Wl,-Bdynamic 2>/dev/null && rm testpcre testpcre.o && echo true||echo false)
 ifeq ($(PCRE_CHECK), true)
     CFLAGS += -DWITH_PCRE
     PCRE_OBJS = pcre$(OBJSUFFICS)
diff --git a/Makefile.unix b/Makefile.unix
index 8031214..7337396 100644
--- a/Makefile.unix
+++ b/Makefile.unix
@@ -54,14 +54,14 @@ ifeq ($(LIBSTATIC), true)
     STATIC_SUFFIX = -Wl,-Bdynamic
     ZLIB = -lz -lzstd
 endif
-WOLFSSL_CHECK ?= $(shell echo "\#include <wolfssl/options.h>\\n\#include <wolfssl/openssl/ssl.h>\\n int main(){return 0;}" | tr -d \\\\ | $(CC) -x c $(CFLAGS) -o testwssl.o - 2>/dev/null && $(CC) $(LDFLAGS) -otestwssl testwssl.o $(STATIC_PREFIX) -lwolfssl $(STATIC_SUFFIX) 2>/dev/null && rm testwssl testwssl.o && echo true||echo false)
+WOLFSSL_CHECK ?= $(shell printf "\#include <wolfssl/options.h>\\n\#include <wolfssl/openssl/ssl.h>\\n int main(){return 0;}" | tr -d \\\\ | $(CC) -x c $(CFLAGS) -o testwssl.o - 2>/dev/null && $(CC) $(LDFLAGS) -otestwssl testwssl.o $(STATIC_PREFIX) -lwolfssl $(STATIC_SUFFIX) 2>/dev/null && rm testwssl testwssl.o && echo true||echo false)
 ifeq ($(WOLFSSL_CHECK), true)
     LIBS += $(STATIC_PREFIX) -lwolfssl $(STATIC_SUFFIX)
     CFLAGS += -DWITH_SSL -DWITH_WOLFSSL
     SSL_OBJS = ssllib$(OBJSUFFICS) ssl$(OBJSUFFICS)
     ZLIB :=
 else
-OPENSSL_CHECK ?= $(shell echo "\#include <openssl/ssl.h>\\n int main(){return 0;}" | tr -d \\\\ | $(CC) -x c $(CFLAGS) -o testssl.o - 2>/dev/null && $(CC) $(LDFLAGS) -otestssl testssl.o $(STATIC_PREFIX) $(ZLIB) -lcrypto -lssl  $(STATIC_SUFFIX) 2>/dev/null && rm testssl testssl.o && echo true||echo false)
+OPENSSL_CHECK ?= $(shell printf "\#include <openssl/ssl.h>\\n int main(){return 0;}" | tr -d \\\\ | $(CC) -x c $(CFLAGS) -o testssl.o - 2>/dev/null && $(CC) $(LDFLAGS) -otestssl testssl.o $(STATIC_PREFIX) $(ZLIB) -lcrypto -lssl  $(STATIC_SUFFIX) 2>/dev/null && rm testssl testssl.o && echo true||echo false)
 ifeq ($(OPENSSL_CHECK), true)
     LIBS += $(STATIC_PREFIX) $(ZLIB) -lcrypto -lssl $(STATIC_SUFFIX)
     CFLAGS += -DWITH_SSL
@@ -70,13 +70,13 @@ else
     ZLIB :=
 endif
 endif
-PCRE_CHECK ?= $(shell echo "\#define PCRE2_CODE_UNIT_WIDTH 8\\n\#include <pcre2.h>\\n int main(){return 0;}" | tr -d \\\\ | $(CC) -x c $(CFLAGS) -o testpcre.o - 2>/dev/null && $(CC) -o testpcre testpcre.o $(LDFLAGS) $(STATIC_PREFIX) -lpcre2-8 $(STATIC_SUFFIX) 2>/dev/null && rm testpcre testpcre.o && echo true||echo false)
+PCRE_CHECK ?= $(shell printf "\#define PCRE2_CODE_UNIT_WIDTH 8\\n\#include <pcre2.h>\\n int main(){return 0;}" | tr -d \\\\ | $(CC) -x c $(CFLAGS) -o testpcre.o - 2>/dev/null && $(CC) -o testpcre testpcre.o $(LDFLAGS) $(STATIC_PREFIX) -lpcre2-8 $(STATIC_SUFFIX) 2>/dev/null && rm testpcre testpcre.o && echo true||echo false)
 ifeq ($(PCRE_CHECK), true)
     CFLAGS += -DWITH_PCRE
     PCRE_OBJS = pcre$(OBJSUFFICS)
     PCRE_LIBS = $(STATIC_PREFIX) -lpcre2-8 $(STATIC_SUFFIX)
 endif
-PAM_CHECK ?= $(shell echo "\#include <security/pam_appl.h>\\n int main(){return 0;}" | tr -d \\\\ | $(CC) -x c $(CFLAGS) -o testpam.o - 2>/dev/null && $(CC) $(LDFLAGS) -o testpam testpam.o -lpam 2>/dev/null && rm testpam testpam.o && echo true||echo false)
+PAM_CHECK ?= $(shell printf "\#include <security/pam_appl.h>\\n int main(){return 0;}" | tr -d \\\\ | $(CC) -x c $(CFLAGS) -o testpam.o - 2>/dev/null && $(CC) $(LDFLAGS) -o testpam testpam.o -lpam 2>/dev/null && rm testpam testpam.o && echo true||echo false)
 ifeq ($(PAM_CHECK), true)
     PLUGINS += PamAuth
 endif
diff --git a/Makefile.win b/Makefile.win
index 1b38198..3c76abc 100644
--- a/Makefile.win
+++ b/Makefile.win
@@ -47,14 +47,14 @@ ifeq ($(LIBSTATIC), true)
     STATIC_SUFFIX = -Wl,-Bdynamic
     ZLIB = -lz
 endif
-WOLFSSL_CHECK = $(shell echo "\#include <wolfssl/options.h>\\n\#include <wolfssl/openssl/ssl.h>\\n int main(){return 0;}" | tr -d '\\\\' | $(CC) -x c $(CFLAGS) $(LDFLAGS) $(STATIC_PREFIX) -lwolfssl $(STATIC_SUFFIX) -o testwssl - 2>/dev/null && rm testwssl && echo true||echo false)
+WOLFSSL_CHECK = $(shell printf "\#include <wolfssl/options.h>\\n\#include <wolfssl/openssl/ssl.h>\\n int main(){return 0;}" | tr -d '\\\\' | $(CC) -x c $(CFLAGS) $(LDFLAGS) $(STATIC_PREFIX) -lwolfssl $(STATIC_SUFFIX) -o testwssl - 2>/dev/null && rm testwssl && echo true||echo false)
 ifeq ($(WOLFSSL_CHECK), true)
     LIBS += $(STATIC_PREFIX) -lwolfssl $(STATIC_SUFFIX) -lws2_32
     CFLAGS += -DWITH_SSL -DWITH_WOLFSSL
     SSL_OBJS = ssllib$(OBJSUFFICS) ssl$(OBJSUFFICS)
     ZLIB :=
 else
-OPENSSL_CHECK = $(shell echo "\#include <openssl/ssl.h>\\n int main(){return 0;}" | tr -d '\\\\' | $(CC) -x c $(CFLAGS) $(LDFLAGS) $(STATIC_PREFIX) $(ZLIB) -l crypto -l ssl $(STATIC_SUFFIX) -o testssl - 2>/dev/null && rm testssl && echo true||echo false)
+OPENSSL_CHECK = $(shell printf "\#include <openssl/ssl.h>\\n int main(){return 0;}" | tr -d '\\\\' | $(CC) -x c $(CFLAGS) $(LDFLAGS) $(STATIC_PREFIX) $(ZLIB) -l crypto -l ssl $(STATIC_SUFFIX) -o testssl - 2>/dev/null && rm testssl && echo true||echo false)
 ifeq ($(OPENSSL_CHECK), true)
     LIBS += $(STATIC_PREFIX) $(ZLIB) -l crypto -l ssl $(STATIC_SUFFIX) -lcrypt32
     CFLAGS += -DWITH_SSL
@@ -63,11 +63,11 @@ else
     ZLIB :=
 endif
 endif
-PAM_CHECK = $(shell echo "\#include <security/pam_appl.h>\\n int main(){return 0;}" | tr -d '\\\\' | $(CC) -x c $(CFLAGS) $(LDFLAGS) -l pam -o testpam - 2>/dev/null && rm testpam && echo true||echo false)
+PAM_CHECK = $(shell printf "\#include <security/pam_appl.h>\\n int main(){return 0;}" | tr -d '\\\\' | $(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
-PCRE_CHECK = $(shell echo "\#define PCRE2_CODE_UNIT_WIDTH 8\\n#include <pcre2.h>\\n int main(){return 0;}" | tr -d '\\\\' | $(CC) -x c $(CFLAGS) $(LDFLAGS) $(STATIC_PREFIX) -lpcre2-8 $(STATIC_SUFFIX) -o testpcre - 2>/dev/null && rm testpcre && echo true||echo false)
+PCRE_CHECK = $(shell printf "\#define PCRE2_CODE_UNIT_WIDTH 8\\n#include <pcre2.h>\\n int main(){return 0;}" | tr -d '\\\\' | $(CC) -x c $(CFLAGS) $(LDFLAGS) $(STATIC_PREFIX) -lpcre2-8 $(STATIC_SUFFIX) -o testpcre - 2>/dev/null && rm testpcre && echo true||echo false)
 ifeq ($(PCRE_CHECK), true)
     CFLAGS += -DWITH_PCRE
     PCRE_OBJS = pcre$(OBJSUFFICS)