Allow builds on old gcc's that don't like declarations in for loops

daviesrob · jkbonfield · commit ecc49b97a8c5 · 2023-12-06T12:31:05.000Z
diff --git a/htscodecs/rANS_static32x16pr_avx512.c b/htscodecs/rANS_static32x16pr_avx512.c
@@ -658,7 +658,8 @@ unsigned char *rans_compress_O1_32x16_avx512(unsigned char *in,
                 // transpose matrix from 32xBATCH to BATCHx32
                 for (j = 0; j < 32; j++) {
                     for (i = 0; i < BATCH; i+=16) {
-                        for (int z = 0; z < 16; z++)
+                        int z;
+                        for (z = 0; z < 16; z++)
                             t32[i+z][j] = c[j][i+z];
                     }
                 }

Original file line number	Diff line number	Diff line change
`@@ -658,7 +658,8 @@ unsigned char rans_compress_O1_32x16_avx512(unsigned char in,`
`658`	`658`	`// transpose matrix from 32xBATCH to BATCHx32`
`659`	`659`	`for (j = 0; j < 32; j++) {`
`660`	`660`	`for (i = 0; i < BATCH; i+=16) {`
`661`		`- for (int z = 0; z < 16; z++)`
	`661`	`+ int z;`
	`662`	`+ for (z = 0; z < 16; z++)`
`662`	`663`	`t32[i+z][j] = c[j][i+z];`
`663`	`664`	`}`
`664`	`665`	`}`