0.20211223: MacOS support

Author: zvezdochiot

Makefile

@@ -1,10 +1,10 @@
-
 APPNAME ?= jpegqs
-CFLAGS ?= -Wall -O2 -fopenmp -DAPPNAME=$(APPNAME)
+MPFLAGS ?= -fopenmp
+CFLAGS ?= -Wall -O2 $(MPFLAGS) -DAPPNAME=$(APPNAME)
 LIBS ?= -ljpeg -lm
 SRCS = src
 
-ifeq ($(shell uname --machine), x86_64)
+ifneq ($(shell uname --machine), i386)
     CFLAGS += -fPIC
 endif
 

README.md

@@ -69,6 +69,11 @@ If you do not want to use SSE, type:
 make CFLAGS="-fopenmp -O2 -mno-sse2"
 ```
 
+If you do not want to use OPENMP (MacOS), type:
+```sh
+make MPFLAGS=
+```
+
 ### With libjpeg 6b form sources
 ```sh
 wget https://www.ijg.org/files/jpegsrc.v6b.tar.gz

src/libjpegqs.c

@@ -21,16 +21,16 @@
 
 void quantsmooth_init(JQS_PARAMS jqsparams)
 {
-    int i, l0, l1, p0, p1;
+    int i, l0, l1, x, y, p0, p1;
+    float *tab, bcoef;
     JCOEF coef[DCTSIZE2];
 
     range_limit_init();
 
     for (i = 0; i < DCTSIZE2; i++)
     {
-        float *tab = quantsmooth_tables[i];
-        float bcoef = jqsparams.border;
-        int x, y, p0, p1;
+        tab = quantsmooth_tables[i];
+        bcoef = jqsparams.border;
         memset(coef, 0, sizeof(coef));
         coef[i] = 1;
         idct_fslow(coef, tab);