diff --git a/openair1/PHY/CODING/nrLDPC_decoder/nrLDPC_tools/generator_bnProc/Makefile b/openair1/PHY/CODING/nrLDPC_decoder/nrLDPC_tools/generator_bnProc/Makefile
deleted file mode 100644
index b44c5bf56b..0000000000
--- a/openair1/PHY/CODING/nrLDPC_decoder/nrLDPC_tools/generator_bnProc/Makefile
+++ /dev/null
@@ -1,27 +0,0 @@
-C=gcc
-CFLAGS=-W -Wall -mavx2 -DCODEGEN=1
-LDFLAGS=
-EXEC=bnProc_gen_avx2
-SRC= $(wildcard *.c)
-OBJ= $(SRC:.c=.o)
-
-all: $(EXEC)
-
-bnProc_gen_avx2: $(OBJ)
-	@$(CC) -o $@ $^ $(LDFLAGS) -O2 
-
-
-
-%.o: %.c
-	@$(CC) -o $@ -c $< $(CFLAGS) -I ${OPENAIR_HOME}/openair1 -I ${OPENAIR_HOME}/common/utils -I ${OPENAIR_HOME}/common/utils/T -I ${OPENAIR_HOME}/openair2/COMMON -g -std=c99  
-
-.PHONY: clean mrproper
-
-clean:
-	@rm -rf *.o
-
-mrproper: clean
-	@rm -rf $(EXEC)
-
-zip: 
-	@tar -zcvf sauvegarde.tar.gz main.c bnProcPc_gen_BG1_avx2.c bnProcPc_gen_BG2_avx2.c  bnProc_gen_BG1_avx2.c  bnProc_gen_BG2_avx2.c  Makefile
diff --git a/openair1/PHY/CODING/nrLDPC_decoder/nrLDPC_tools/generator_bnProc_avx512/Makefile b/openair1/PHY/CODING/nrLDPC_decoder/nrLDPC_tools/generator_bnProc_avx512/Makefile
deleted file mode 100644
index 016d414945..0000000000
--- a/openair1/PHY/CODING/nrLDPC_decoder/nrLDPC_tools/generator_bnProc_avx512/Makefile
+++ /dev/null
@@ -1,27 +0,0 @@
-C=gcc
-CFLAGS=-W -Wall -mavx2 -DCODEGEN=1
-LDFLAGS=
-EXEC=bnProc_gen_avx512
-SRC= $(wildcard *.c)
-OBJ= $(SRC:.c=.o)
-
-all: $(EXEC)
-
-bnProc_gen_avx512: $(OBJ)
-	@$(CC) -o $@ $^ $(LDFLAGS) -O2 
-
-
-
-%.o: %.c
-	@$(CC) -o $@ -c $< $(CFLAGS) -I ${OPENAIR_HOME}/openair1 -I ${OPENAIR_HOME}/common/utils -I ${OPENAIR_HOME}/common/utils/T -I ${OPENAIR_HOME}/openair2/COMMON -g -std=c99  
-
-.PHONY: clean mrproper
-
-clean:
-	@rm -rf *.o
-
-mrproper: clean
-	@rm -rf $(EXEC)
-
-zip: 
-	@tar -zcvf sauvegarde.tar.gz main.c  bnProc_gen_BG1_avx512.c  bnProc_gen_BG2_avx512.c  Makefile
diff --git a/openair1/PHY/CODING/nrLDPC_decoder/nrLDPC_tools/generator_cnProc/Makefile b/openair1/PHY/CODING/nrLDPC_decoder/nrLDPC_tools/generator_cnProc/Makefile
deleted file mode 100644
index 4bd827b48b..0000000000
--- a/openair1/PHY/CODING/nrLDPC_decoder/nrLDPC_tools/generator_cnProc/Makefile
+++ /dev/null
@@ -1,27 +0,0 @@
-C=gcc
-CFLAGS=-W -Wall -mavx2 -DCODEGEN=1
-LDFLAGS=
-EXEC=cnProc_gen_avx2
-SRC= $(wildcard *.c)
-OBJ= $(SRC:.c=.o)
-
-all: $(EXEC)
-
-cnProc_gen_avx2: $(OBJ)
-	@$(CC) -o $@ $^ $(LDFLAGS) -O2 
-
-#main.o: cnProc_gen_avx2.h
-
-%.o: %.c
-	@$(CC) -o $@ -c $< $(CFLAGS) -I ${OPENAIR_HOME}/openair1 -I ${OPENAIR_HOME} -I ${OPENAIR_HOME}/common/utils -I ${OPENAIR_HOME}/common/utils/T -I ${OPENAIR_HOME}/openair2/COMMON -std=c99   
-
-.PHONY: clean mrproper
-
-clean:
-	@rm -rf *.o
-
-mrproper: clean
-	@rm -rf $(EXEC)
-
-zip: 
-	@tar -zcvf sauvegarde.tar.gz main.c cnProc_gen_BG1_avx2.c cnProc_gen_BG2_avx2.c Makefile
diff --git a/openair1/PHY/CODING/nrLDPC_decoder/nrLDPC_tools/generator_cnProc_avx512/Makefile b/openair1/PHY/CODING/nrLDPC_decoder/nrLDPC_tools/generator_cnProc_avx512/Makefile
deleted file mode 100644
index f2f8f5e367..0000000000
--- a/openair1/PHY/CODING/nrLDPC_decoder/nrLDPC_tools/generator_cnProc_avx512/Makefile
+++ /dev/null
@@ -1,27 +0,0 @@
-C=gcc
-CFLAGS=-W -Wall 
-LDFLAGS=
-EXEC=cnProc_gen_avx512
-SRC= $(wildcard *.c)
-OBJ= $(SRC:.c=.o)
-
-all: $(EXEC)
-
-cnProc_gen_avx512: $(OBJ)
-	@$(CC) -o $@ $^ $(LDFLAGS) -O3  
-
-#main.o: cnProc_gen_avx512.h
-
-%.o: %.c
-	@$(CC) -o $@ -c $< $(CFLAGS) -I ${OPENAIR_HOME}/openair1 -g    -std=c99
-
-.PHONY: clean mrproper
-
-clean:
-	@rm -rf *.o
-
-mrproper: clean
-	@rm -rf $(EXEC)
-
-zip: 
-	tar -zcvf sauvegarde.tar.gz main.c cnProc_gen_BG1_avx512.c cnProc_gen_BG2_avx512.c  Makefile
diff --git a/openair1/PHY/CODING/nrLDPC_decoder/nrLDPC_tools/run_ldpc_generators.sh b/openair1/PHY/CODING/nrLDPC_decoder/nrLDPC_tools/run_ldpc_generators.sh
index a89c57bcf6..091034b978 100755
--- a/openair1/PHY/CODING/nrLDPC_decoder/nrLDPC_tools/run_ldpc_generators.sh
+++ b/openair1/PHY/CODING/nrLDPC_decoder/nrLDPC_tools/run_ldpc_generators.sh
@@ -1,17 +1,11 @@
 #!/bin/bash
-$(
-cd $OPENAIR_HOME/openair1/PHY/CODING/nrLDPC_decoder/nrLDPC_tools
-rm -rf ldpc_gen_files
-mkdir ldpc_gen_files
-cd ldpc_gen_files
-mkdir cnProc
-mkdir cnProc_avx512
-mkdir bnProc
-mkdir bnProc_avx512
-mkdir bnProcPc
-mkdir bnProcPc_avx512
-cd ../generator_bnProc; make; make clean; ./bnProc_gen_avx2 ../ldpc_gen_files
-cd ../generator_cnProc; make; make clean; ./cnProc_gen_avx2 ../ldpc_gen_files
-cd ../generator_bnProc_avx512; make; make clean; ./bnProc_gen_avx512 ../ldpc_gen_files
-cd ../generator_cnProc_avx512; make; make clean; ./cnProc_gen_avx512 ../ldpc_gen_files
-)
+
+echo "to build the LDPC decoder headers: go to the build directory, and type"
+echo "make/ninja ldpc_generators"
+echo
+echo "assuming your build directory is ran_build/build, I trigger building for"
+echo "you now. The generated headers will be in ran_build/build/ldpc/generator_*/"
+echo
+
+cd $OPENAIR_HOME/cmake_targets/ran_build/build
+make ldpc_generators || ninja ldpc_generators